A decade-long experiment led by Duke University scientists indicates that trees provide little help in offsetting increased levels of the greenhouse gas carbon dioxide.
The trees didn’t offset nearly as much carbon as once thought and is not nearly enough to offset emissions. Worse, only those trees that got substantial water and nutrients were able to store “significant” amounts of carbon.
That means proposals to use trees to bank increasing amounts of carbon dioxide emitted by humans may depend too heavily on the weather and large-scale fertilization to be feasible.
So now we have a burgeoning trading market in carbon credits that may have no scientific credibility to back it up.