Forest

A forest is a region with a high thickness of trees (or, historically, a wooded area set aside for hunting). There are many definitions of a forest, based on a variety of criteria. These plant communities cover large areas of the globe and function as animal habitats, hydrologic flow modulators, and soil conservers, comprise one of the most important aspects of the Earth's biosphere. Although often thought of as carbon dioxide sinks, mature forests are approximately carbon neutral with only disturbed and young forests acting as carbon sinks. Nonetheless mature forests do play a significant role in the global carbon cycle as stable carbon pools, and clearance of forests leads to an increase of atmospheric carbon dioxide levels.
Forests can be found in all regions talented of sustaining tree growth, at altitudes up to the tree-line, except where natural fire frequency is too high, or where the environment has been impaired by natural processes or by human activities.