Is natural gas renewable? | HowStuffWorks
science.howstuffworks.com › environmental › energyAug 29, 2012 · Natural gas is a fossil fuel in liquid form that can be used as an energy source. When it's burned, it releases 25 percent fewer greenhouse gases and pollutants (sulfur, carbon, nitrogen) into the atmosphere than burning oil does. Natural gas is primarily methane gas (anywhere from 70 to 90 percent), but it also contains trace amounts of other usable gases, such as ethane, propane, butane and nitrogen. Natural gas is found in subterranean reservoirs, often near oil deposits. It's refined and ...