Man has to depend mostly on nature and environment for energy resources. Due to excessive exploitation of natural energy resources, we are rapidly approaching severe 'Energy Crises.' Hence we have seriously to ponder over proper management of Environmental Energy Resources. The present Encyclopaedia in two volumes, a veritable mine of authoritative information, is most timely publication. Many important issues are systematically discussed with the help of diagrams, wherever necessary. Major topics dealt are: Introduction to Energy Sources; Energy Statistics; Thermodynamical Concept; Energy, Carbon Balance and Climate Change; Sources of Energy Fuels Sources of Energy; Pollutants from Fuels and Their Emission Factors; CoaI as a Sources of Energy; Fire Ecology; Energy from the Biomass; Biomass Burning; Personal and Portable Monitors for Major Biofuel Air Pollutants; Venyilation and Concentrations in Consumption of Fuels; Reducing Exposures: Fuels and Stoves; Oil and Natural Gas; Hydropower; Energy, Geothermal; Energy from the Wind; Energy from Streams and Oceans; Energy from the Atom; Nuclear Energy; Energy from the Sun; Energy Use in Agriculture and Changing Forestry; Impact of Migration of Energy Use; Impact of Migration on Energy Use; Dynamics of Energy Use in Household Sector; Energy in Industry and Transport; Energy Sources and Technologies: Hard Choices etc. Besides the academic value, this Encyclopaedia will prove of utmost use for the environmental scientists, policy planners and activists in the field.