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Synopsis The earth receive energy from the sun mostly in the form of visible light. The bulk of this energy is not absorbed by the atmosphere since the atmosphere is transparent to visible light. 50 per cent of the sun’s energy reaches the earth which is absorbed by the surface as heat. Because f its temperature the earth’s surface radiates energy in infrared range.

The greenhouse gases are not transparent to infrared radiation so they absorb infrared radiation. Infrared radiation is absorbed from all directions and is passed as heat to all gases in the atmosphere. The atmosphere also radiates in the infrared range and does so in all directions. The surface and lower atmosphere are warmed because of the greenhouse gases and makes our life on earth possible.

The objective of this book is to provide the whole knowledge about the global warming, ozone depletion, pollution, nuclear power and their cycle by which user can understand and learnt all the concepts that are described in this book. The book has been especially written according to the requirements of the syllabus.