For anyone in or near Toronto, the Royal Ontario Museum (ROM) is currently hosting an exhibition of Salgado's "Genesis" collection. It is absolutely wonderful, and so large (on two floors) that it is hard to take in on one visit. Highly recommended.
The ROM also has a video on its web site wherein Salgado describes his journey into photography, his eventual burnout, and his recovery, leading to the Genesis project. A very passionate and interesting man.http://www.rom.on.ca/en/exhibitions-galleries/exhibitions/current-exhibitions/genesis-sebastiao-salgado