How many forests are on earth?

As of recent estimates, there are approximately 3.9 trillion trees in around 3.04 million square kilometers of forested area globally. Forests cover about 31% of the Earth's land area, with the largest expanses found in the Amazon, Congo Basin, and boreal forests of Russia and Canada. The exact number of distinct forests can vary based on classification criteria, but they are typically grouped into types such as tropical, temperate, and boreal forests.