I've got to hand it to Joe Romm--veteran energy expert, revered climate blogger, and now gambling man--he's putting his money where his mouth is. Accused in some camps of being a touch alarmist in his predictions of the imminent effects of climate change, he's taking wagers on the melting of arctic sea ice.

The bet: Romm's putting down $1000 on his prediction that "the Arctic Sea will be essentially ice-free" by 2020.

The interesting bit is that the bet was taken up by some actually climate scientists, not the deniers that Romm was luring. Still, he lays down a solid case why he's comfortable with the bet. Since it's a long and intricate case, I'll just give you the link in case you care to check it out.