Planting a Trillion Trees May Be the Best Way to Fight Climate Change, Study Says

(WASHINGTON) — The most effective way to fight global warming is to plant lots of trees, a study says. A trillion of them, maybe more.

And there's enough room, Swiss scientists say. Even with existing cities and farmland, there's enough space for new trees to cover 3.5 million square miles (9 million square kilometers), they reported in Thursday's journal Science. That area is roughly the size of the United States.

(WASHINGTON) — The most effective way to fight global warming is to plant lots of trees, a study says. A trillion of them, maybe more. And there's enough room, Swiss scientists say. Even with existing cities and farmland, there's enough space for new trees to cover 3.5 million square miles (9 million square kilometers), they reported in Thursday's journal Science. That area is roughly the size of the United States.