The sun is the biggest source of energy.We also produce energy from flowing water,wind, plant coal ,crude oil, natural gas, uranium,etc.
Renewable sources of Energy
The sources of energy that will not go to end or that can be recovered are called renewable sources of Energy.
Solar Energy
The energy of the sun which reaches on the Earth and other planets in the form of heat and light is called solar energy.
We use use solar energy in every walk of life . Plants use it for making food . solar cells use it in calculator, watches,etc .
Solar Energy is the everlasting source of energy.it is available for use free of cost all the time.it is pollution free.it cannot go to end. It is thus called a renewable source of Energy.