The Amazon, the largest rainforest in the world, roughly half the size of the United States, is key to the health of the entire planet. Its trees produce an estimated 20% of the world’s oxygen, while putting an enormous amount of water into the atmosphere at a time when cities are drying up. The Amazon is sucking in carbon and greenhouse gases while slowing the rising temperatures. But it’s now burning at a record rate — with images from space showing the smoke covering much of Brazil.
Read more: cnn.com