Writer Paul Greenberg is a favorite of the Green Radio Hour for his wit and prolific-ness! We talk about his most recent book, "The Climate Diet: 50 SIMPLE STEPS TO TRIM YOUR CARBON FOOTPRINT." And National Geographic Explorer of the Year Bryan Christy, who spent years chasing some of the world's most notorious wildlife traffickers,  has just published his first novel, "In the Company of Killers," whose hero is a slightly-jaded writer who chases some of the world's most notorious wildlife traffickers!.