Make a list of conventional and non-conventional sources of energy. Give a brief description of harnessing one non-conventional source of energy.

(N/A) Conventional sources of energy are those that have been used for a long time and are generally non-renewable,such as fossil fuels (coal,petroleum,natural gas) and thermal power plants.
Non-conventional sources of energy are those that are renewable and have been developed recently,such as solar energy,wind energy,tidal energy,and geothermal energy.
Harnessing Solar Energy: Solar energy is harnessed using solar cells (photovoltaic cells) that convert sunlight directly into electricity. $A$ solar cell is made of silicon and produces a small voltage when exposed to light. Many such cells are combined in a solar panel to generate sufficient power for domestic or industrial use.