How green is the Amazon?
Not as green as it used to be, as shown in an analysis of satellite images made during last year's record-breaking drought.
As scientists from around the world gather in Cancun for the latest U.N. conference on climate change, Stuart Grudgings reports from Caapiranga, in the heart of the Amazon rainforest, for his special report "Weird weather leaves Amazon thirsty."
It sounds almost too good to be true: new technology that would be better than carbon neutral -- it would be carbon negative, taking more climate-warming carbon dioxide out of the air than factories and vehicles put in. It's called air capture technology, and Reuters took a look at some promising versions of it on October 1.