A new Yale-led study estimates that there are more than 3 trillion trees on Earth, about seven and a half times more than some previous estimates. But the total number of trees has plummeted by roughly 46 percent since the start of human civilization, the study estimates.
Using a combination of satellite imagery, forest inventories, and supercomputer technologies, the international team of researchers was able to map tree populations worldwide at the square-kilometer level.
Their results, published in the journal Nature, provide the most comprehensive assessment of tree populations ever produced and offer new insights into a class of organism that helps shape most terrestrial biomes.
https://environment.yale.edu/news/article/Yale-study-reveals-there-are-3-trillion-trees-on-earth?utm_medium=email&utm_campaign=8+September+2015&utm_content=8+September+2015+CID_aa44d187a7bc0af0e14823e0a4305b8f&utm_source=Email%20Newsletter&utm_term=Study%20There%20are%20Many%20Many%20More%20Trees%20Than%20Previously%20Believed
