Bill McKibben: I

The environmentalist is jetting around the world to try to halt climate change

What do you call a climate change campaigner sitting on an aeroplane? Sheepish. Especially since this flight to London is one of about 100 I

A few years ago I decided it was time to do more. With six college students I organised a day of more than 1,400 rallies across the United States, helping to change Barack Obama