This document discusses the importance of trees and forests. It notes that within 100 years, rainforests may be gone as 17% of the Amazon has been cleared in 50 years. Trees provide oxygen, clean the air and water, provide habitat for biodiversity, jobs for people, medicine ingredients, and help regulate climate change by absorbing carbon dioxide. One tree can absorb up to 48 pounds of carbon dioxide per year. There are estimated to be over 3 trillion trees on Earth already, but more need to be planted to address climate change issues.