Renewable Energy

Why should we use solar energy to generate electricity?
Answered by Planet Green
  • Planet Green

    Planet Green

  1. Currently, most of the world's electricity is generated by burning fossil fuels, such as coal, oil and gas. However, these fuels, when burned, produce toxic emissions that decrease our air quality and may cause global warming as well. Solar energy is an excellent alternative energy source, since it is waste-free and uses the readily available energy of the sun.

    There are two primary solar-harvesting technologies: Photovoltaic (PV) and Concentrating Solar Thermal (CST). PV solar cells generate energy by converting solar energy directly into an electrical charge. Solar thermal technology, on the other hand, generates energy indirectly; the heat is concentrated to produce steam, and the steam then powers a generator that puts out electricity.

    More answers from Planet Green »

Still Curious?
  • How does the hydrologic cycle make rain from seawater?

    Answered by Science Channel

  • Are you insulting methane if you call it a tetrahedron?

    Answered by Planet Green

  • How can solar panels be used effectively on highways?

    Answered by Science Channel


What are you curious about?

Image Gallery