Natural gas may heat our homes and help us cook, but rarely do people consider where it comes from--or even what it's made of. Incredibly, this gaseous mix of mostly methane and ethane didn't become a major source of the world's energy until the 1960s. It was thought to be an inconsequential by-product of oil production. There's much to learn about natural gas in this beneficial book, which focuses on how the gas is formed as well as examines how...