If you have internet, go to the Mother Nature Network's site and check out the photos of the 15 most toxic places on Earth. The pictures are mind-boggling even though the word "toxic" is not always the right word to use.
The photos of rivers are the worst, in my opinion, because I can compare them to how the rivers here in Montana look.
Some of the photos don't really tell the story. You get that from the brief descriptions.
The last photo, which I believe might be a composite or artist's rendition of the Earth from space, is just creepy. The things we do without looking ahead.