How long would it take for the world's largest rainforest to burn down? If we don't do anything to stop it, we'll soon find out. The Amazon rainforest creates 20% of the Earth's oxygen. It's home to ...

Tracy and I on our hike through the rainforest (Tapajós National Forest in Brazil). Tracy is wearing one of the blue ponchos provided by The Nature Conservancy to protect from the heavy rain that ...