Bibliografia
Energies no renovables:
https://ca.wikipedia.org/wiki/Energia_no_renovable
Combustibles:
https://ca.wikipedia.org/wiki/Combustible
Avantatges i inconvenients:
https://www.searchingresult.com/?pid=9POLWR59T&dn=free-blog-content.com
Tipus d ‘ energies no renovables:
https://ca.wikipedia.org/wiki/Energia_no_renovable