The sun is an extraordinarily powerful source of energy. In fact, the Earth 11 20,000 times more energy from the sun than we currently use. If we used more of this source of heat and light, it 12 all the power needed throughout the world.
We can harness energy from the sun, or solar energy, in many ways. For instance, many satellites in space are equipped with large panels whose solar cells transform sunlight directly 13 electric power. These panels are covered with glass and are painted black inside to absorb as much heat as possible.
Solar energy has a lot to offer. To begin with, it is a clean fuel. In contrast, fossil fuels, such as oil or coal, release 14 substances into the air when they are burned. 15 , fossil fuels will run out, but solar energy will continue to reach the Earth long after the last coal has been mined and the last oil well has run dry.
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