The Issue: Bill Gates’ revision of his former stance on the urgency of fighting climate change. Well, well, well — Microsoft founder and climate-change zealot Bill Gates has had a change of heart ( “Gates: OK, sky not falling,” Oct. 29). He knows he’s milked the climate-change cow for all its worth, and now he’s on to the next big money-maker: artificial intelligence . He’s acutely aware of the tremendous need for electricity to power Microsoft’s development and deployment of AI. He’s also