What Happens When Fossil Fuels Burn?
Fossil Fuel Basics Fossil fuels contain molecules called hydrocarbons, composed of hydrogen and carbon. When these molecules are heated, they react with oxygen in the atmosphere. This reaction produces new molecules and releases more heat. This heat can be used to generate electricity, heat homes, power cars and to accomplish many other purposes. Fossil fuels also contain sulfur, nitrogen and traces of heavy metals, which are released when they burn. Biproducts The hydrogen reacts with oxygen to produce H2O, or water. The carbon produces a lot of CO2 (carbon dioxide) and some CO (carbon monoxide) as well. Sulfur and nitrogen also combine with oxygen, producing sulfur oxides and nitrogen oxides. Some heavy metals and other pollutants are simply released into the air. Effects The worst effect of burning fossil fuels is global warming. When the sun shines on the earth, some of its energy is turned into heat and radiated back out into space. Carbon dioxide traps the heat, reflecting it bac
