Relating Emissions of Carbon to Characteristics of Consumption in India

In order to determine how the average Indian’s emissions may be reduced, one needs to understand the consumption basket and the implications of various categories of household consumption (such as cereals or durables) on emissions. With this in mind, this paper looks at consumption choices in India and calculates per capita carbon dioxide emissions of the different categories of consumption during 1987-1988 to 2007-2008. It is seen that both the increase in per person consumption and a change in the product basket have led to an increase in emissions per person. Further, the urban or higher class Indian emits more, not only because he consumes more of everything (compared, respectively, to the rural or lower class Indian), but also because of differences in the composition of consumption. Four products/product groups – fuel for cooking, fuel for lighting, durables and housing – are further explored to identify several problem products.


INTRODUCTION
The fact that India is the third highest emitter of Carbon dioxide (CO2) (after China and the USA) is less important relative to its future potential, given that it emits only 6.24% (2015) compared to 28.21 and 15.99% by the two other countries, and given that its rank is 127 th in terms of per capita emissions (1.7 metric tonnes per year) [1]. This is supported by the fact that over 1990-2012, India's per cent change in emissions was 236% (second only to China for which it was 262%) [2]. During this period the per cent change in the European countries has been negative or very low. In 2016 the change in emissions per capita has been 5.1% for India, whereas for China it was actually negative (−0.7%) [3].
In order to comprehend how India's future emissions may be limited or reduced, one needs to look at the past. What has caused India's emissions to rise? For most high emissions countries including India, a positive and very high correlation between Gross Domestic Product (GDP) and CO2 emissions (the Pearson correlation coefficients are 0.99 for both China and India, 0.95 for the US and 0.94 for Japan for the period 1987-2008) points towards the obvious culprit, total production (the one exception to this is the EU, for which the correlation coefficient is negative at −0.39. This may be due to aggressive climate policies). Of the two components of GDP, population and per person production, the former has certainly been responsible, but the continued decline in population growth rates since the 1980s increasingly shifts the responsibility to the rise in per person emissions, which in turn has been caused by the rise in per person income and expenditure [4].
This paper focuses on per person emissions (in this paper the term 'emissions' refers to emissions of CO2, which constitutes 80% of greenhouse gases) and its immediate cause, per person expenditure. It determines total emissions per person per year and its change over time. It also breaks up these emissions by product and well as consumer groups in order to identify the culprits.
Scientists have constantly endeavored to measure the relative carbon footprints of specific consumer goods such as household power technologies [5] or various food categories [6]. Social scientists, too, are shifting from discussions on sectoral emissions [as in publications by the Intergovernmental Panel on Climate Change (IPCC)] to exploring the role of the consumer in climate change.
A body of research that is almost wholly based on input-output analysis uses various data sources to look for the reasons behind changes in consumption over time in the context of global warming. The start may be attributed to the debate between Commoner [7] and Ehrlich and Holdren [8] on what impacts environmental degradation the most. While the latter considered overpopulation to be the overriding factor, the former had a more balanced approach and thought that technological and social development had the capacity to contain environmental damage. This debate resulted in the IPAT equation: Impact = Population × Affluence × Technology (1) What becomes implicit, in this sort of formulation, is that if the growth in population and affluence cannot be contained, climate change mitigation policy has to centre on technological solutions [9]. Income class and the consumption basket come up as critical determinants of an individual's carbon footprint in much of this work [10]. Hertwich and Peters [9] calculate the shares of certain product groups (food, shelter and mobility turn out to be the most important consumption categories in the current context, followed by services and manufactured goods) in per capita Greenhouse Gas (GHG) footprint -for 73 countries. For India, this share is 41% for food, 14% for shelter and 12% for mobility, whereas for the US these shares are 8%, 25% and 21% respectively. Food and services take up a greater share in developing countries, while mobility and manufactured goods rise rapidly with income and dominate in rich countries. A paper by Kok et al. [11] has reviewed several of these publications, including the work on Australia initiated by Lenzen [12] and taken up by others too, which points out the greater role of indirect versus direct emissions and once again concludes that increasing incomes increases emissions.
Data based research increasingly makes the point that technology cannot, by itself, keep climate change in check, and that the role of affluence (vis-à-vis population growth) is on the rise. Hence, there is a need to reduce or control per capita consumption [13]. In their study of China and India, Hubacek et al. [4] observe an enormous rise in emissions by the average individual. According to them, India requires an (improbable) gain in energy efficiency to the tune of 98% to satisfy 'current' carbon agreements. Feng, Hubacek and Guan [14] use the IPAT model to analyze what contributed to the growth of CO2 emissions in 5 regions of China over the last 50 years. They find regional as well as rural-urban differences in consumption trajectories. They, too, determine that technological improvements have not been able to fully compensate for the increase of emissions due to population growth and increasing wealth. Alfredsson [15] has conducted an interesting study of Swedish households that concludes that adopting green patterns of consumption while retaining the same level of total consumption does not solve the problem of climate changeit is at best a temporary palliative. Part of the reason is the rebound effect -the money or energy saved is used to increase the consumption of other products. Further, increasing levels of per capita incomes (and hence expenditure) not only cancels out the emissions reduction but also causes a net increase in emissions.
Policy-oriented discourses accompany research that is skeptical about technology. Some of them investigate the political economy of consumerist growth in developing countries led by the middle classes, who are influenced by the state as well as entrepreneurs to consume more (see articles in Lange and Meier [16]). Others, in a similar vein, question the assumption that more products enhance happiness -thereby finding a solution to climate change through the reduction of material consumption [17]. Rajan [18] presents a comprehensive coverage of transport policy for climate change mitigation -much of it, however, applies to climate policy in general. In his view, technology and pricing have to be supplemented by social as well as infrastructural change. Kola-Lawal et al. [19] explore implementation factors (such as drivers, benefits and barriers) affecting pro-environmental behaviour in developed versus developing countries. Shakya [20] provides a comprehensive demand-oriented package for Kathmandu, Nepal. For India, similar studies have been done by Padukone [21], Sanwal [22] and Roy [23].
Research substantiated by data on household consumption in India and its implications for climate change is somewhat limited. Rather, there is some literature on consumption and its determinants that can be useful, though it does not touch upon carbon impacts. Gangopadhyay and Wadhwa have done this for general consumption patterns [24] and Pachauri [25] looks at energy consumption. Lakshmana [26] tries to identify demographic factors that may have affected India's environment (including its climate) -these include changes in population, age structure, household size and the urban population. The conclusions are not based on a concrete analysis of data that conclusively proves the correlations. The most substantial research on the connection between consumption and climate change in India remains the 1997 paper by Murthy et al. [27], where they use input-output tables to connect consumption behavior amongst certain classes of Indian consumers and the resultant carbon emissions. They thereby estimate average emissions per capita in 1990 and project what it will become in 2020. By exploring scenarios of technology improvement, they, too, indicate a bias towards technological solutions. A subsequent paper by Parikh et al. [28] is an update of the earlier work.
This research carries the enquiry forward, looking in some detail at the individual consumer's expenditure and emissions thereof. Several aspects of this research have not been investigated well in previous work -one, it looks at changes over a twenty year span, two, it investigates the less researched issue of the rural-urban divide as well as the well-researched one of income class differences, both being extremely relevant in the context of consumption behavior in developing nations with a large rural population, and three, it looks at smaller product sets (for example, several components of food rather than food as a whole) including individual products (such as specific durable goods) as well as product types (such as mud vs. brick houses) in order to identify the culpable products.

RESEARCH GOALS
Per person emissions may go up because of a rise in the quantity of consumption by the average person (which is in turn caused by a rise in real income per person), but it may also go up because of changes in the consumption basket. In previous research, changes in the quantity and composition of the average Indian's consumption of goods and services over time (Table 1) and differences (in both quantity and composition of consumption) between rural and urban India, as well as between expenditure classes [29] have been identified. The chief objective of this paper is to determine per person emissions and its change over time and also to apportion this amongst product and consumer groups.
Emissions data for individual products (produced in India) as well as household consumption data (of product groups or individual products) from the National Sample Survey (NSS), mainly on Monthly Per Capita Expenditure (MPCE) but also in other formsis used for this research, and the time span is 1987-1988 to 2007-2008 (20 years).

EMISSIONS PER PERSON BY PRODUCT GROUP, CHANGES OVER TIME
To estimate emissions due to the individual's consumption by product group, Indian data on emissions intensity for individual products compiled by Grunewald et al. [30] is used. This data is for the year 2005 (and includes goods that were imported). It is in terms of emissions in kilo-tons per 100,000 rupees, which is converted to grams per rupee. The authors have estimated CO2 emission intensities a using single region input-output model based on Global Trade Analysis Project, www.gtap.agecon.purdue.edu (GTAP). Both direct and indirect emissions from goods produced and consumed in India as well as imports were accounted for [30], pp 4-7. In the study, carbon emissions from coal, crude oil, natural gas, petroleum products including kerosene, electricity (coal-based) and fuelwood have been considered. Given that the share of renewable and nuclear energy in the production of electricity was negligible in 2005, it may be said that the fuel sources implied high levels of CO2 emissions per unit energy produced.
As the data is in 2005 prices, retail price indices are used to obtain corresponding values for 1987-1988, 1993-1994 and 2007-2008. Emissions intensity for product 'groups' is then determined by using weights to add up the individual emissions intensities where the weight used with emissions by product i is given, for the relevant year (1987/1988 or 1993/1994 Table 2 gives the emissions per rupee (2007-2008) of each product group, listed in terms of rank (highest to lowest), in rural and urban India. It needs to be observed that data on emissions per kg of the product is not being presented here. Emissions intensity (that is, emissions per rupee) is the product of emissions per kg and kg per rupee (the latter being the inverse of price). So cheaper products would show higher emissions intensity, even if emissions per kg were the same. This may be why emissions intensity for cereals is very high, and higher than for other food items including animal based foods.
The emissions intensities turn out to be different in rural and urban areas because the consumption baskets are different -for example, in the case of fuel for cooking and lighting, for which the difference is very high, the basket of goods is also very different -in particular, in cities each rupee buys much more electricity as well as Liquified Petroleum Gas (LPG), while in villages each rupee buys more fuelwood and kerosene, and far less electricity. The enormous emissions intensity of electricity (about 0.5 kg per rupee) causes the rural-urban difference in emissions intensity for this category.
Using the emissions intensity data for 1987-1988 and MPCE data for 1987-1988 and 2007-2008 (both in 1987-1988 prices) (Table 1), total emissions due to an individual's monthly consumption of various product groups in 1987-1988 and 2007-2008 in both rural and urban India (Figures 1 and 2) is derived. Over 20 years, there has been a huge increase (around two times) in the category 'miscellaneous goods and services', which includes conveyance, medical care and educational services. The increase is also substantial for fuel used in cooking and lighting. On the other hand, there has been a significant drop in emissions from cereals. For all other product groups including non-cereals and durables, the rise in emissions is not as significant. The difference between urban and rural India is that the former had much higher levels of emissions to begin with, and the changes are also higher for fuel used in cooking and lighting, as well as for miscellaneous goods and services. On the other hand, the drop in emissions from cereals is proportionately less than in rural India.  The three major policy measures related to food are the Public Distribution System initiated in the 1960s, which made cereals available at a low price, the Green Revolution of the 1970s, which increased the output of cereals per unit land and the White Revolution (also called Operation Flood) which began in 1970 -a sea-change to a co-operative system of milk production and distribution that eliminated middlemen, enhanced rural incomes and made milk more easily available. The impact of all three policies occurred before the time period of this study, but they may have determined the initial consumption levels of cereals and milk in 1987-1988. While the first two policies reduced cereal deficiency in both rural and urban India [31], it is Operation Flood that may have contributed to the greater consumption of milk in urban areas. The prohibitive price as well as the lack of distribution outlets prevented rural India from increasing milk consumption to the same extent [32].
If one looks at the food and non-food divide for monthly per person emissions (Figure 3), emissions per person from food goes down very slightly, particularly in urban areas, whilst that from non-foods goes up significantly -hence of course average emissions go up, and it is the non-foods that drive the change.
Hence, to sum up, total average emissions by an Indian have gone upand this is to be expected, given the rise in real expenditure. But the change in the product 'basket' has also had a negative effect, in spite of the fall in emissions of cereals, because of the dominance of emissions from non-foods. Also, as there has been a fall in the percentage of rural population (from 75.2 in 1987 to 69.8 in 2008), the impact of the greater magnitudes as well as changes in urban India on the total effect is even more. Rural Urban  Table 3 provides, for 2007-2008, the difference in MPCE by product group in rural and urban areas. Using this in conjunction with Table 2, one can derive the rural-urban differential in monthly per capita emissions on various product groups. This is shown in Figure 4. Whilst there are significant differences in several categories, the one that stands out is for cooking and lighting fuel. Figure 5 demonstrates the differences in terms of food and non-foods as well as cereals and non-cereals in urban and rural areas. The emissions due to the consumption of non-foods or non-cereals is significantly higher in urban compared to rural India -the difference is much lower for food or cereals. In other words, non-foods and non-cereals drive the rural-urban difference. As rural India constituted around 70 per cent of the total population in 2007-2008, its lower levels of per

Journal of Sustainable Development of Energy, Water and Environment Systems
Year 2018 Volume 6, Issue 2, pp 255-275 capita emissions from all product groups and in particular, fuel for cooking and lighting, pulls down the country level emissions per capita.   (Tables 4 and 5). Some of the product groups in the NSS may sometimes have to be aggregated to obtain the groups that have been presented in this paper: for example, 'fruits fresh' and 'fruits dry' are added to obtain data for 'fruits'. First, for all classes, the 'magnitude' of emissions is highest for fuel for cooking or lighting, and (to a much lesser extent) for cereals and cereal substitutes. But the categories medical care, 'miscellaneous goods and entertainment', 'clothing and footwear' and durables also cause reasonably high levels of emissions for the 'highest' (10 th ) decile class in urban as well as rural India, and the same holds for 'beverages, refreshments, processed foods etc.', 'consumer services excluding conveyance', education and conveyance in 'only' urban India. Interestingly, emissions from conveyance are the lowest amongst the high emission groups in urban India (it is, as may be expected, not very significant in rural India). Second, whatever the product group, emissions 'always' go up with class, because consumption always goes up with class. The increase of emissions with higher class is particularly high for 'milk and milk products', fruits, education, medical care, conveyance and 'consumer services excluding conveyance' in both rural and urban areas and additionally for 'beverages, refreshments, processed foods, etc.' and 'miscellaneous goods and entertainment' in urban areas. Further, there is a very distinct jump from the 9 th to the 10 th decile classes in both urban and rural India -especially for education, medical care, conveyance, durables and 'beverages, refreshments, processed foods, etc.'. Third, the emissions ratio between non-foods and food increases steadily with higher class but there is again a sudden leap (by 52% in both urban and rural areas) between the 9 th and 10 th decile classes in both rural and urban India. The emissions ratio between non-cereals and cereals also rises with class, with the rise being particularly high between the 1 st and 2 nd as well as the 9 th and 10 th decile classes in both rural and urban India.

DISTRIBUTION OF HOUSEHOLDS ACCORDING TO TYPES OF PRODUCT USED
Data on the distribution of households according to the various kinds of fuel or housing and various durables provides insight that may be fruitfully used in policy formulation. As this data is not in terms of MPCE, emissions calculations are not being made. However, the emissions implications will become obvious wherever comparisons are necessary. For durables, the non-availability of data reduces the time period to 1993-1994 to 2009-2010.

Fuel for cooking
It has been seen that emissions from the use of cooking and lighting fuel constitute the highest proportion of total emissions for all consumer groups. These emissions have increased enormously over time and one may assign a much greater responsibility to urban and upper class India. Policy measures, however, require that specific 'types' of fuel used by households and their relative carbon emissions are understood. For this, data on the distribution of households according to the nature of fuel employed may be observed.
Firewood and chips has been the dominant cooking fuel in India, and it remains so, but the importance of LPG has grown steadily, especially after 1999. The use of LPG went up by 13% between 1999-2000 and 2004-2005, whilst the use of kerosene and firewood declined by 12% and 1% respectively [34,35]. Although the role of firewood remains significant, LPG is now the dominant cooking fuel in urban India.
Two policies that could have had an impact on emissions from the use of firewood in rural India were the National Program on Improved 'Chullahs' (cook-stoves) and Joint Forest Management (JFM) initiated in 1983 and 1990 respectively. The first program provided fuel efficient cook-stoves at highly subsidized (50 per cent) prices. The objective was fuel efficiency -but it was, for a variety of reasons (such as the free availability of firewood), not successful [36]. The second program (JFM) could have controlled the use of firewood and also increased forest cover, thereby reducing carbon emissions. The former did not occur because there were no cheap substitutes for firewood, and the latter occurred marginally -between 1990 and 2000 the average annual reforestation rate was 0.57 per cent, this reduced to 0.04 per cent between 2000 and 2005. The total change in forest cover between 1990 and 2005 was only around 6 per cent, and in 2005 the forest cover stood at around 23 per cent of total land area [37]. On the other hand, the LPG program, which was initiated in the 1950s but gathered momentum in the 1960s, was very successful. However, even though LPG was subsidized, only urban households in the middle and higher income groups could afford it, and access to the gas cylinders was poor in the rural areas [38]. This bias has led to the rural-urban difference seen in Figure 6.  Data on emissions by various fuels is available from sources such as biomassenergycentre.org.uk or volker-quaschning.de. The latter says that emissions in kg of CO2 per kilo-watt-hour is 0.39 for wood, 0.34 for hard coal, 0.26 for kerosene and 0.23 for LPG. It also says that emissions for electricity depends on the fuel used and the efficiency of the power plant -if it burns coal and the efficiency is 34%, 1 kg. CO2 is emitted per kilo-watt-hour of electricity use.
As emissions from LPG are less than that from firewood and chips or even kerosene, it may be inferred that over time the shift to LPG has kept emissions low. Also, the urban ( Figure 6) and higher classes (Figures 7 and 8) are less responsible for per capita emissions due to the greater use of LPG as a cooking fuel.  Between 1987Between -1988Between and 1993Between -1994, there has been an increase in the proportion of households using electricity for lighting by 13 percentage points (24 to 37%) in rural areas and 9 percentage points (72 to 83%) in urban areas. In 1993-1994, kerosene remained the main source of energy for lighting in rural India. But a decline had occurred in the percentage of households using kerosene (74 to 62% in rural and 27 to 16% in urban areas) since 1987-1988 [34]. By 2004-2005, kerosene no longer remained the main source of lighting in rural areas and became insignificant in urban areas. There has been an increase in the proportion of households using electricity as the major source of there was a drop in the percentage of households using kerosene as the primary source of energy for lighting from 51 to 44% in rural India, and from 10 to 7% in urban India, since 1999-2000 [35].

Fuel for lighting
Hence electricity has become the dominant source of lighting in both rural and urban India, replacing kerosene, but kerosene remains significant for the former. The increasing choice of electricity for lighting, given that in India electricity is produced with low-grade coal and hence emits more per kilo-watt-hour compared to kerosene (or for that matter, any other energy source) has increased per capita emissions over time. Also, the urban ( Figure 9) and higher classes (Figures 10 and 11) are more responsible for emissions relative to the others, due to their greater use of electricity for lighting.
The objective of policy makers has always been to encourage electricity use -at first in urban areas, and then in rural areas. There were several rural electrification programs in 1988-1989, 2002 and 2004-2005 [39].
Rural Urban Although the rate of increase in electricity use has been very high, around 20 per cent of the population, mostly in rural areas, is yet to access it [40]. There are differential subsidies on electricity based on the type and quantity of usehouseholds and especially the poorer ones are heavily subsidized [41]. On the other hand, the subsidy on kerosene was ineffective in promoting equitable access to the fuel due to large leakages [42]. Hence government policies and their effectiveness clearly affected the shift to electricity for lighting. The absence of efficiency standards in production, transmission, distribution and use, as well as the use of low quality coal, implied (as Figures 1 and 2 indicate) enormous increases in carbon emissions due to this shift to electricity. It is only near the end of the time span of this study that the National Electricity Policy (2005) and the National Action Plan on Climate Change (2008) spelt out the need to use non-fossils and introduced a tariff structure that favoured them, but even in 2010, renewables constituted only 9 per cent of the total [43]. As seen earlier (Table 1), the use of energy by each individual for the purpose of cooking and lighting has increased over time, this, combined with the preponderance of electricity (for lighting) is negating the positive impacts of a shift to LPG (as evident from Figures 1 and 2), and upper class and urban India play a prominent role in this process.

Durables
The category 'durables' includes many kinds of goods, some that require energy for their use, and some that do not. The emissions impact of each of these products may be expected to be very different. Once again, therefore, policy decisions would require an understanding of the relative pollution implications of various durables.
As may be expected, since 1993-1994 there has been a rise in the use of durables over time (Tables 6, 7) and urban India as well as the richer classes (Tables 6, 7 and [44]) consume more durables compared to their rural and poorer counterparts, with a steep jump in per capita consumption between the 9 th and 10 th expenditure decile classes [33]. For durables, therefore, the postulate that the urban and higher classes cause more emissions per capita holds. The 'percentage' increase is greater for motorcycles and scooters, TVs, refrigerators and washing machines in rural areas and much greater for motor cars and jeeps in urban areas. For air conditioners and air coolers, too, the percent increase is substantial -and similarin urban and rural areas (Table 7).
There are only a few (non-electronic, non-motorized) exceptions, most notably bicycles, whose use (in 2009-2010) decreases (in terms of percentages of possessor households) after a particular decile class (for bicycles it is the 7 th decile class in rural MPCE class Electricity Kerosene areas and the 3 rd decile class in urban areas) [44], although there has been an overall (though not significant) increase in the use of bicycles (Tables 6, 7). It is interesting, moreover, to note that other than bedsteads (and fans in urban areas), the average number of individual durable goods possessed is less than 1 in 1999-2000.  Following liberalization and reformation in 1991-1992, banks and financial institutions were allowed to provide loans (without stringent conditions) for the purchase of motorized vehicles. Also, liberalized financial markets created the possibility of paying for durables in easy monthly instalments [45]. However, prices as well as greater access to electricity allowed only urban Indians to take advantage of these changes. This is reflected in the changes and their difference over the study period. Amongst durables, the products of greatest concern are motorized vehicles, whose emissions implications from production as well as use are the highest [46]. Emission norms were first instituted in 1991, and then catalytic converters and unleaded petrol were made mandatory. India is following EU emissions norms since 1999, albeit with a time lag. However, the inspection and maintenance program is imperfect and corrupt. Also, like the EU, there are no limits on CO2 emissions from motorized vehicles [47]. While there are investments on public transport and it continues to be preferred by the majority due to much lower costs, a tax on fuel has been the only instrument used to discourage commuters from using low occupancy private transport [48].

Dwelling units
The NSS does not include dwelling units in the data on MPCE (although 'maintenance' is included), perhaps because expenditures on purchasing houses are lump sum and infrequent. As housing has been identified to be a product with a high carbon footprint [49], it would have been useful if one could have compared emissions due to the monthly 'consumption' of housing vis-a-vis other products. In the absence of this possibility, types of housing (on which data exists) and the manner in which this is changing in India are observed. The nature of dwelling units, that is whether they are 'pucca' (made with brick, cement, steel, etc.) or 'katcha' (made with natural materials) is important from the perspective of emissions. Although no exact calculations of carbon emissions for the two types of dwelling unit are available, the list of materials for each type [50] allows one to infer that the construction of 'pucca' houses, for the same floor area, causes much more carbon emissions, as it is much more energy intensive compared to the construction of 'katcha' houses. Also, statements regarding the difference between the two in terms of carbon emissions can be found in websites such as www.yourhome.gov.au /technical/fs56.html [Your Home Technical Manual 5.6, Mud Brick (Adobe)].
By the end of the first decade of the 21 st century, 'pucca' houses dominate the scenario (Figure 12), replacing 'katcha' and 'semi-katcha' houses. The rate of change is far greater in rural India, whilst the possibility of change in urban India (which had a high percentage of 'pucca' houses to begin with) was itself limited. It may then be deduced that this pronounced shift in the direction of 'pucca' houses has vastly increased carbon emissions. Moreover, the urban ( Figure 12) and higher classes [33] are more responsible, the latter also because they occupy larger covered areas. It should, however, be noted that the percentage of 'pucca' dwellings in rural areas (50% in 2007-2008) is not at all small, and the average covered area is marginally greater in rural compared to urban areas [33]. The liberalization of 1991-1992 also allowed banks and financial institutions to provide easy loans to both purchasers and builders of 'pucca' houses. Also, schemes to provide affordable housing to the urban poor have existed since the 1950s, but they have had minimal impact. It is the liberalized loans that contributed to the enormous increase in the construction of 'pucca' houses in both rural and urban areas [51].

CONCLUSIONS
Over 1987-1988 to 2007-2008, both the total as well as the composition of consumption has changed such that there are more emissions per person. The more significant changes are a fall in emissions due to cereals and a rise in emissions due to fuel for cooking and lighting, as well as a set of services including conveyance, medical care and education. Second, at the per capita level, urban India is far more responsible (for carbon emissions) in terms of quantity as well as the product mix. The difference is due to the greater predominance of non-foods in urban India and is particularly significant in the case of fuel for cooking and lighting. As rural India compares favourably relative to urban India in terms of per capita emissions, its dominance in total population (70 per cent in 2007-2008) has a positive impact on per capita emissions of the average Indian. Third, as one ascends the expenditure class ladder, the carbon footprint at the per capita level goes up, both due to the quantity and the composition of consumption -the latter being increasingly weighed in favour of non-foods. There is a significant jump in emissions between the second highest and highest decile classes in both urban and rural India -hence the highest decile class may be clearly earmarked for policies to abate carbon emissions.
A few interesting features need to be highlighted. One, the consumption of cereals has declined over time, and this decline is more for the urban and higher classes -as emissions intensity (grams per rupee) of cereals is high, this should have had a positive effect over time and reduced the responsibilities of urban and higher class Indiahowever, because of the greater impact of non-foods relative to food, this impact is not visible. Two, the only product that allows the urban and affluent to score a point over the rural and less affluent is LPG used in cooking, which emits far less per unit energy use compared to fuelwood or kerosene. However, this advantage, too, is eclipsed by the greater use of electricity for lighting in urban areas as well as by those who are better off.
In general, most policies taken up before 2008 had objectives other than emissions reduction (such as energy efficiency), although some of them might have inadvertently had a beneficial effect on emissions. It is only in recent years that climate abatement is in itself a policy objective [52]. A 'carbon tax' has been introduced for coal, and CNG/LPG have become mandatory for some forms of public transport in big cities. Electricity subsidies have been generally reduced, but increased for renewable sources. Also, as has been seen, policies favoured urban Indiasuch as Operation Flood, the promotion of LPG for cooking, providing access to electricity and housing schemes. In fact, policies such as easy loans encouraged consumption (and emissions thereof) in urban India. The urban bias is being corrected to some extent -for example, LPGs are being made more available in rural areas, and general subsidies have been replaced by subsidies for low income groups. There are programs of rural electrification using renewables -in particular, solar energy. On the whole, however, existing policies are far from sufficient for India to keep its recent promise to cut the emissions intensity of GDP (from 2005 levels) by 33-35 per cent by 2030 [53].
What are the implications of the results in terms of policy? Currently consumption expenditure is heavily weighed in favour of cereals. Amongst food items, the emissions intensity of cereals, in grams per rupee, is the highest. Hence in the present scenario a certain amount of shift towards non-cereals (as is occurring), especially in rural India, would improve the average diet and would actually reduce (as is seen in Figures 1 and 2) total emissions. However, one category that requires attention is 'beverages, refreshments and processed foods', whose emissions (and MPCE) are very high for the highest decile class. Amongst non-foods, the major category of concern is fuel for cooking and lighting (more specifically electricity for lighting and fuelwood for cooking), but services like conveyance, medical care and education and conveyance also require attention. Further, nearly all products are of concern when one looks at the uppermost decile class -especially in urban areas but also in rural. The consumption of durables, though not substantial as yet, is increasing rapidly. Amongst durables the category to watch out for is motor vehicles (both cars and bikes), but the use of several electronic goods like refrigerators, televisions, air conditioners and washing machines are also increasing rapidly (though their current values are low) in rural areas. Newer products, in particular mobile phones and computers are not included in the reports of 2007-2008 and earlier. They make an appearance in Report No. 541 of 2009-2010, where it is seen that their use (in terms of the number of possessor households) increases considerably with expenditure class. Finally, there has occurred a sea change in the nature of housing, with a predominance of 'pucca' houses whose construction causes greater emissions.
Most of the changes -such as the conversion to 'pucca' houses, electrification and the purchase of electronic goods -are perhaps inevitable -as they improve the quality of living. For these, policy can only concentrate on reducing emissions caused by their use. In a few cases, such as for conveyance, one can think of substitutes or try to control demand.
The trends identified in this paper will intensify in the immediate future, not only because real per capita expenditure is going up, but also because rural India is emulating its urban counterpart -it is shifting to electricity and 'pucca' houses, and purchasing motor vehicles -in fact, the per cent increase in some of these products is much greaterthis forebodes a dangerous future that would be similar to the current situation in Chinawhere rural household energy consumption is higher than urban, one of the reasons being the replacement of bicycles with motorbikes [54]. Further, the rapid urbanization of the Indian population (at around 2.7% per year) increases the impact of the energy guzzling urban consumer.