What If We Planted a Trillion Trees?

It's dawn, it's dark and you don't what kind of weather is waiting for you outside your tent. It doesn't matter anyway. In rain, hail, sleet, snow, or blistering heat, you're on the front lines, shovel in hand, wearing over 20 kilos (50 pounds) of gear, battling against nature to save the environment. On a good day, you might plant 2,000 trees in a 10-hour shift.