So much energy being wasted on mining, save the planet maaaaaaannn. But seriously, there is so much energy/power being used in mining. It's an obscene amount.
No, it's a demonstration of the most simple rule of economics. People respond to incentives.
If you could come up with a way for miners to get paid a little bit more if their rig cleaned x liters of air per bitcoin mined (not counting the dust that accumulates on the damn things, heh) people would jump on that too.