Add Yahoo as a preferred source to see more of our stories on Google. A year after a wildfire, the U.S. Forest Service assesses the damage to figure out how many trees need to be planted to restore ...

One person can’t measure all the trees in the world, but when many people come together, a global view becomes possible. A worldwide collaboration of scientists has produced the first ground-sourced ...

More than 3 trillion trees now grow on Earth, seven times more than scientists previously thought. But it's also trillions fewer than there used to be, a new study concludes. A United ...