Global warming and people rising out of poverty are sure to bring about a big surge in the production of air conditioning units, which are massive energy consumers. Richard Branson, having realized the risk this poses in our quest to reach our climate goals, has started a $3 million competition to spur new air conditioning technology. To have any chance at winning, participants must come up with a solution that has five times less climate impact than a standard AC at no more than twice the cost.