We are fossil fuel addicts. What happens when drug addicts detox? They can be rash, cranky, even psychotic and dangerous. It would be good for the environment if the entire economy abruptly quit fossil fuels, but that's not realistic. I wouldn't want to be around if it ever happened. Perhaps it's best to think of natural gas like methadone. It's a way for an energy addicted society to get off dirtier fuels and smooth out the detox bumps.