EcoWatch: An international collaboration of scientists has just completed the ultimate green census--by calculating that the planet is home to 3.04 trillion trees.
The latest estimate is far higher and almost certainly more accurate than any previous attempt. But the bad news is that humans are removing trees at the rate of 15 billion a year--and there are now about half as many as there were at the dawn of civilization.
For every person on Earth, there are 422 trees--in total, more than 3,000 billion...