Lichens are "exquisitely" threatened by climate change, and could go extinct within a century.
In a beautiful victory in the fight against food waste, Raley's will now sell ugly vegetables.
The pontiff is tweeting up a storm about his new climate change encyclical.
A labor commission rules that Uber drivers should be treated as employees -- and casts a big question-mark over the entire "Uber-for-this-and-that" market.
"We don’t need a superhero, but maybe we do need more people to get angry and turn that into action."
It's hard to keep track of the heroes and villains in the fight to save rainforests. A ranking of companies that use palm oil offers some guidance.
The visualization shows how our everyday climate questions differ around the world.
From space, China's massive new solar farm is an impressive sight.
Sorry, foodies: The food movement isn't working.