I slightly dislike(I know, I can be petty) those Twitter people who seems to think that Bitcoin is the answer to literally whatever news-trending problem there is. But "wasted" renewable energy is one good use-case of Bitcoin mining. They contribute to the network, and at the same time they get value in exchange for the supposedly wasted energy. Win-win!
Look around here and most people here think that Bitcoin will cure every problem in the world when it is not true Bitcoin is not a solution to everything. Anyway I do not think it is limited to Twitter but this forum has a lot of these types of people to.