<http://schema.org/description>
"What a difference a leaf makes! Well, not one leaf. We have 3.1 trillion trees on our planet\u2014that\u2019s 422 trees per person. If we count all the leaves on all those trees and take a look at what they do collectively to the air around us, the effect\u2014and I do not exaggerate\u2014is stunning. I\u2019ve got&amp;hellip;"^^<http://www.w3.org/2001/XMLSchema#string>
<http://phenomena.nationalgeographic.com/2016/03/09/the-earth-has-lungs-watch-them-breathe/>