will exist in 100 years, based on the current rate of deforestation.
Currently, forests cover about 30 percent of the world's land area.
But we are losing more than 46,000 square miles of forest (~22 million football fields) every year due to:
Trees absorb carbon dioxide from the atmosphere. But when trees are cut down, their stored carbon is released back into the air.
[sources: National Geographic, World Wildlife Fund, BBC News]