AmazonFACE: Brazil is building a complex of towers arrayed in six rings poised to spray carbon dioxide into rainforest

Deep in the Amazon, Brazil is building a complex of towers arrayed in six rings poised to spray carbon dioxide into the rainforest. The aim is to understand how the world's largest tropical forest responds to climate change. Known as AmazonFACE, the project will probe the forest's remarkable ability to sequester carbon dioxide — an essential piece in the puzzle of world climate change.