To mitigate the effects of the climate change, there are increasing call and search for alternative energy sources. For more details visit the Climate Change section. Fossil fuels, for instance, has been noted for producing tremendous amount of green house gases (GHGs) which are heat trapping gases believed to be responsible for global warming with its attendant problems. Some energy sources are non-polluting or have low pollution while others produce tremendous pollution as by-products of the transformation process that takes them to useful forms. Renewable energy sources are sources that are freely available and cannot be easily depleted while the non-renewable sources can run out and are often not freely available. Some energy sources are renewable while others are non-renewable. Organic matters from the plant and animal remains later turn into the fossil fuels (Coal, oil and natural gas) which are currently widely in use for energy supply. The traditional energy source, fossil fuels, received the initial energy from the light used by plants for photosynthesis and animal metabolic needs. There are various forms of energy sources. does not change - net energy lost balances net energy gained within the system. However, overall energy within a system is conserved i.e. Electricity, heating, and lighting for home and industrial uses are all derived through energy.Įnergy comes in different forms: kinetic, mechanical, electrical etc.Įnergy can be transformed from one form to the other. Humans, animals, and mechanical/ electrical systems require energy inputs to perform. Practically all things on Earth require one form of energy or the other to function as designed or desired. Energy is the ability of a system (human, mechanical etc) to do work.
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