ENERGY AND ENVIRONMENT 0501-280. Bhatt BP, Sachan MS (Agroforestry Div, ICAR Res Complex, NEH Region, Umroi Rd, Umiam 793 103, Meghalaya). Firewood consumption pattern of different tribal communities in north-east India. Energy Policy, 32(1)(2004), 1-6 [25 Ref]. Firewood consumption pattern of three tribal communities of Meghalaya, India – Garo, Khasi, and Jaintia – were studied under varying ecological, socio-economic, and socio- cultural conditions. Fuelwood consumption was highest in the Khasi community (5.81 kg/capita/day), followed by the Garo (5.32 kg/capita/day) and then the Jaintia (3.90 kg/capita/day), irrespective of their socio-economic status. The labour energy expenditure for fuelwood collection was highest for the Jaintia (88.56 MJ/capita/year) and minimum for Garo (70.64 MJ/capita/year). Since 90% of the total population uses biomass as an important source of energy, this information could be utilized for developing appropriate technology for afforestation programmes in this region. 0501-281. Kishore VNN, Bhandari PM, Gupta P (The Energy Resource Inst, Darbari Seth Block, IHC Complex, Lodi Rd, New Delhi 110 003). Biomass energy technologies for rural infrastructure and village power: opportunities and challenges in the context of global climate change concerns. Energy Policy, 32(6)(2004), 801-810 [15 Ref]. The biomass resource base of a developing country (such as India) is comparable to that of fossil fuels. However, factors such as collection, processing, low end-use efficiency of conventional devices, and insufficient maturity of present biomass energy technologies are major barriers to utilizing available bio-resources more efficiently and on a sustainable basis. Utilization of many energy technologies, rather than a single technology, delivering energy and economic services to rural areas, seems to hold the key for successful commercialization and mainstreaming of biomass energy technologies. 0501-282. Mukhopadhyay Kakali (Cent Dev Env Policy, Indian Inst Manag Calcutta, Joka, Diamond Harbour Rd, Kolkata 700 014). Impact of liberalized trade on energy use and environment in India. J Env Ecol Manag, 1(1)(2004), 75-104 [31 Ref]. Study aims at contributing to environment trade debate by evaluating the impacts of international trade on energy use and emissions of carbon dioxide in the Indian economy during 1993-94 using Input-Output techniques. It has also constructed an index of pollution terms of trade from the energy and the carbon embodied in the exports and imports of India. Finally, the study will explore the implication of the EXIM policy of 2002. Results of 1993-94 show that India produces goods which are more environment friendly than goods it imports thus indicating a large inflow of pollution embodied in trade. 0501-283. Nair Rajesh, Shukla PR, Rana Ashish (Indian Inst Manag, Vastrapur, Ahmedabad 380 015). Energy use and climate change: a policy analysis for India. Assessment of climate change in India and mitigation policies. Ed. SK Dash & Prakash Rao, WWF, New Delhi, 72-88 [10 Ref]. Among the most important anthropogenic causes for climate change is energy use, which is dominated by fossil fuels. In the background of existing energy system in the region and the vulnerability of major natural and social systems in South Asia to climate change, paper analyses the long-term energy and emission trajectories for India under various scenarios using an integrated modeling framework. Scenarios with regional energy cooperation and constraints on carbon emissions (650 ppmv and 550 ppmv) are also discussed. 0501-284. Nawaj I, Khan RJ, Khan ME, Tiwari GN (Cent Energy Stud, Indian Inst Techno Delhi, Hauz Khas, New Delhi 110 016). Optimization of clean environment parameters through renewable energy sources. Int J Ambient Energy, 24(2)(2003), 67- 72 [16 Ref]. Attempt has been made to predict the likely increase in the CO2 content of the atmosphere due to the increase in energy demand in the Indian context. Energy demand is likely to go up because of the rapid increase in population. Statistical methods have been employed for predicting population growth and corresponding power demand. It is found that the population predicted by the present method is in close agreement (within 0.2%) with the result given by the Central Statistical Organisation, Government of India. 0501-285. Paul S, Bhattacharya RN (Khalisani Mahavidyalaya, Khalisani, Chandannagar 712 138). Carbon dioxide emission from energy use in India: a decomposition analysis. Energy Policy, 32(5)(2004), 585-593 [35 Ref]. The factors that have influenced the changes in the level of energy-related CO2 (carbon dioxide) emission have been discussed by means of the decomposition method. The observed changes are analysed in terms of four factors: pollution coefficient, energy intensity, structural change, and economic activity. Emission of CO2 in the industrial and transport sectors show a decreasing trend due to improved energy efficiency and fuel switching. However, the reducing effect of the pollution coefficient and energy intensity on CO2 emissions in the agricultural sector is almost nil. The energy intensity varies over a wider range, and has had a greater impact on energy-induced CO2 emission than the pollution coefficient. 0501-286. Saravanane R, Sivasankaran MA, Sundararaman S, Sivacoumar R (Dept Civil Engng, Pondicherry Engng Coll, Environ Engng Lab, Pondicherry 605 014). Anaerobic sustainability for integrated biomethanation of sugar mill waste and municipal sewage. J Environ Sci Engng, 46(2)(2004), 116-122 [17 Ref]. Study investigates the viability of biogas generation by integrating the biodegradable waste product of sugar industry. The total solid content of pressmud and sewage mixture was optimized with respect to maximization of biogas yield with continuous monitoring over several operating parameters. Optimum total solid content of 5% found to yield 80m3 of biogas per ton of pressmud compared to 65m3 per ton of conventional digestion of pressmud alone.