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However , associating CO2 emissions with electricity consumption involves three major complications : First , electricity may be generated from a number of different primary energy sources , many of which are major sources of CO2 emissions ( e.g ., coal combustion ) ; whereas , others result in virtually no CO2 emissions ( e.g ., hydro ) . In both Southeast and Northeast Asia , including Siberia and the Russian Far East , are found significant reserves of natural gas and oil , the development and distribution of which cross national borders.42 In South Asia , there is potential for crossborder hydro development , especially between Nepal and India . With a push to develop small-scale cascade hydro systems , the aim is to have 30 % of electricity from hydro by about 2010 ( cf 19 % in 1995 ) . Similarly , consumers should not be asked to pay extra for environmental practices that are already required by law ( e.g ., hydro spills required to protect fish ) . This region has a strong history of mining energy efficiency , which is the second largest resource behind hydro electricity . Biomass with solar thermal energy produced on the sunny days can in combination with monsoon hydro generation with limited reservoir capacity can in hybrid system make it possible to provide 60 % of the total energy in the renewable form . Biomass with solar thermal enegy provides on the sunny days can in combination with monsoon hydro generation limited reservoir capacity for few regulation can in hybrid system make it possible to provide 60 % of the total energy in the renewable form . In South Asia , there is potential for crossborder hydro development , especially between Nepal and India .