Fossil fuels are formed by natural processes such as decomposition. They vary from hydrogen all the way to methane. They are nonrenewable resources because they take millions of years to form. The burning of fossil fuels causes mass releases of carbon dioxide which pollute the Earth. They are used to power houses and other electronics.– Created using PowToon — Free sign up at http://www.powtoon.com/ . Make your own animated videos and animated presentations for free. PowToon is a free tool that allows you to develop cool animated clips and animated presentations for your website, office meeting, sales pitch, nonprofit fundraiser, product launch, video resume, or anything else you could use an animated explainer video. PowToon’s animation templates help you create animated presentations and animated explainer videos from scratch. Anyone can produce awesome animations quickly with PowToon, without the cost or hassle other professional animation services require.