Answer:
Step-by-step explanation:
Geothermal energy does not require burning fossil fuels. There is no fuel required; the energy is harnessed from inside the earth. It is a renewable energy source. It also has huge potential to provide a lot of energy.
Wind energy also does not require burning fossil fuels. The wind is sustainable is some select places. It is also very clean energy.
Solar energy is pollution free. It is renewable power, and it can be installed in many places.