Living on Earth: CURWOOD: Just ahead – Tropical forests and climate disruption. Keep listening to Living on Earth! CURWOOD: It’s Living on Earth, I’m Steve Curwood. Tropical forests cover about seven percent of the Earth, but the widespread cutting and burning of these forests causes some twenty percent of all global warming gas emissions worldwide. So experts in deforestation, rural development, and climate are all working together to make sure that the next international treaty on climate …