I have thought of "cancer-coins". Where every time a miner gets closer to curing cancer they get a portion of the cancer donations that will be called cancer coins. But that's all I have thought of so far...

But when reading your post I thought that if we were wasting so much power, it would be an incentive for the human race to find ways to generate even more power or do it more efficiently. But if we never found new ways to generate masses of power we would probably see a freeze in bitcoins.