Curitiba, greenest city in Brazil
In Curitiba, the "greenest city in Brazil", it's possible to trade household waste for food or bus tickets.
Russia: new gold rush for mammoth ivory
Operation Thunderball: Thousands of wild animals seized
Beloved by Instagrammers, this lake is full of toxic waste
A green ski slope on top of a waste plant in Copenhagen
Three sea turtles released into the ocean in France
Greenpeace is trying to save endangered leatherback turtles