The Earth Has Lungs. Watch Them Breathe.

Robert Krulwich’s excellent program, RadioLab is now one of the most widely downloaded weekly podcasts.  His blog from 9 March 2016 is below What a difference a leaf makes! Well, not one leaf. We have 3.1 trillion trees on our planet—that’s 422 trees per person. If we count all the leaves on all those trees and take a look at …