Although determining the precise number of trees on the planet at any point in time is impossible, there are approximately 400 billion trees around the globe today. The estimate is assisted by data gathered by NASA.
The number of trees across the planet equates to approximately 60 trees for every human being living on the planet. There actually are more trees on the planet at the beginning of 2014 than there were about 100 years earlier. A number of factors contribute to the increase in trees, including more concerted planting efforts and the migration of people from rural to urban areas. The United States is home to 8 percent of the planet's forests.