There are more than three trillion trees worldwide, but that’s only half as many as were around at the start of human civilisation, according to new research. The study, published today in Nature, ...

Trees occupy much of the Earth’s land surface. Many of us interact with them on a daily basis, whether driving down a rural country road, back-country skiing, or having a picnic in a city park.

The figure is eight times as big as the previous best estimate, which counted perhaps 400 billion at most. It has been produced by Thomas Crowther from Yale University, and colleagues, who combined a ...

There are more than 3 trillion trees in the world, according to a fascinating study released in the journal Nature. The good news: That's more than seven times the earlier estimates of 400 billion ...