The largest 1 % of trees in mature forests comprises 50 % of forest biomass worldwide. (blog.thesietch.org)
Clear - cutting of mature forests is already on the rise again: it increased by 28 % in 2013 and is expected to rise again this year. (dotearth.blogs.nytimes.com)
Nonetheless mature forests do play an important role in the global carbon cycle as stable carbon pools, and clearance of forests leads to an increase of atmospheric carbon dioxide levels. (sciencedaily.com)