Know how many trees there are on earth? Roughly speaking, obviously? About 3 trillion. A climate change ecologist at Swiss university ETH Zurich named Tom Crowther figured this out about four years ago. He recently did the math and figured out that the planet easily has room for another 1.2 trillion, and we should get planting. The carbon storage, according to Crowther, would be “way above” 90 billion tons annually; global CO2 output right now is roughly 37 billion tons. Crowther is now trying to figure out where and how best to plant these trillions of trees, and he’s helping a handful of orgs who are right now setting goals to get there. Read more about his research here. Photo: Kazuend