This is the most abundant fossil fuel in the world. A thick, black liquid formed from the buried remains of microscopic marine organisms. A fossil fuel that forms under similar conditions and often with oil, but it forms in a gaseous state. read more
_____ is the world's most populous nation, home to _____ of the people living on Earth. read more
The most cleanly burning fossil fuel available, producing the least pollutants, is _____. read more
Well there are 3 major fossil fuels, Coal, oil, and natural gas. Coal is the most used. Oil is the least used and natural gas is the least air polluted. read more