How many trees are there?

01There are roughly 3 trillion trees on Earth—more than seven times the number previously estimated—according to a tally by an international team of scientists. The study also finds that human activity is detrimental to tree abundance worldwide. Around 15 billion trees are cut down each year, the researchers estimate; since the onset of agriculture about 12,000 years ago, the number of trees worldwide has dropped by 46%.


– Ken McCarthy