Despite his efforts to buy a climate-friendly refrigerator, climate reporter Phil McKenna ended up buying a "carbon bomb" containing a greenhouse gas thousands of times more potent than CO2.
As part of The Takeaway's Power Trip energy series, John Hockenberry heads to Novato, California, where some wacky guys are using the human lung to create better air conditioners.
Listener Steve McArthur tells us how an insulated refrigerator can cool a hot kitchen in the summer.