Forget about the polar ice caps—if the following photo is authentic, global warming appears to be causing the price of Al Gore’s book to completely melt:

For many, that is still too high a price to pay:

Gore’s book has lost 80 percent of its value in a year and a half, as evidenced by this flashback tweet from July of 2012:

https://twitter.com/saro_co/status/224303966723391489/