CoolioGlobal Coolio-ing.9. Coolio. When the rapper toured historically black colleges and universities to throw down the truth about climate impacts last year, he was fully armed — with stats. But earlier this year, Coolio made headlines by denying the reality of anthropogenic climate change. “The earth’s been doing this for millenniums,” he puffed on Celebrity Big Brother. Oh Coolio — stop blowing smoke up our ass.