Question

why should we harness solar energy? name two devices used for harnessing solar energy

Answer 1

solar energy is a renewable source of energy and it is abundant
the devices are
solar cell
solar collector

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Answer 2

Solar energy is a non conventional source of energy and is available plenty in nature and it must be harnessed because we always cannot be dependent on the conventional sources of energy such as coal and petroleum as these sources may be exhausted in future and we must harness or use some of the non conventional energy sources. Solar cells and solar panels are used to harness solar energy.