For decades, natural gas (methane) has been touted as a greener energy alternative to coal, when, according to a new Cornell University study, in considering its whole lifecycle, natural gas appears to be worse for climate change than the coal industry and is more toxic to the environment and human health.
The driver of gas' green halo is true: methane burns cleaner than coal, thus contributing less to global warming during combustion. However, the hydraulic fracturing process — the only way industry knows to get the gas that's left — releases significant amounts of methane, unburned, directly into the atmosphere. When methane isn't burned, it's 20 times more potent a greenhouse gas than carbon dioxide. Combine that with the 1,000 truck trips, on average, 2 million to 8 million gallons of water, and 10,000 to 40,000 gallons of chemicals used per well.