Non renewable energies

The non renewable energies are those that are present in a limited form. They are fossil fuels like oil, coal, gas and nuclear fuels like uranium. These energy sources were the most used until a few years ago, but now they're less used because they are poullants, especially, the fossil fuels.The following slideshows explain these energy sources and how their power plants work:

Authors: Yolanda Caqueiro, Álex Santos, Javier Varela.

Authors: Sandra Martínez, Roi García, Sara Blanco.