Everything humans do destroys the environment. We should all just lay down and die, but our rotting corpses would give off greenhouse gases.
Another delicious irony. As a result of the freakout in the seventies about chloroflourocarbons destroying the ozone layer, envirowackos forced, at enormous expense, substitution of hydroflourocarbons as a refrigerant. It now turns out that hydroflourocarbons, which are leaking out of refrigerators and air conditioners all over the globe, are an extremely potent greenhouse gas, far more so in even tiny amounts than carbon.