Mount Everest : mountain climbers leave their trash behind
Mount Everest has turned into the world's highest garbage dump.
Activist Hilda Flavia Nakabuye's speech at the C40 in Copenhagen
Low-tech initiatives: Providing villages with water without using any electricity
France: A pristine nature reserve in the Alps
Brazil: tarballs have been piling up on over 100 beaches
Interview: Native Americans are facing a new threat according to Casey Camp Horinek
Why is Copenhagen such a sustainable city?