EVERYDAY SCIENCE

Detailed explanation-1: -The global primary energy sources for stationary power generation and for transportation are fossil fuels. Currently fossil-based fuels like oil, coal and natural gas, provide approximately 85 % of all energy being used worldwide. The current exploration of shale oil and shale gas also concerns fossil fuels.

Detailed explanation-2: -Primary energy sources take many forms, including nuclear energy, fossil energy–like oil, coal and natural gas–and renewable sources like wind, solar, geothermal and hydropower.

Detailed explanation-3: -The three major categories of energy for electricity generation are fossil fuels (coal, natural gas, and petroleum), nuclear energy, and renewable energy sources.

Detailed explanation-4: -(i) Primary Sources of Energy : They can be directly used to provide energy to manufacturing process as well as can be used in production of electric power. (ii) Final Sources of Energy : Sources of final commercial energy are coal, lignite, petroleum and energy based on sunshine, wind, tidal energy and bio-mass.

Detailed explanation-5: -Fossil energy sources, including oil, coal and natural gas, are non-renewable resources that formed when prehistoric plants and animals died and were gradually buried by layers of rock.