A trillion dollars' worth of heavy crude oil has attracted the world's oil titans to western Canada — and they're making a mess. The World and GlobalPost's GroundTruth Project head to the skies for a look at the sweeping impact of oil extraction from the Alberta Tar Sands.
Some of the countries most at risk from climate change are low-lying nations. And chief among them is the South Asian country of Bangladesh. Bangladesh is experimenting with floods to prevent floods. Daniel Grossman has our story on PRI's The World.
The island of Madagascar is home to an enormous variety of plants and animals, most of which live only there. But the primeval, or virgin, forests that are home to these species are under intense pressure. Malagasy people, especially poor people, see the