Although often thought of as as carbon dioxide sinks, mature forests are approximately carbon neutral with only disturbed and young forests acting as carbon sinks. (sciencedaily.com)
Forests act as carbon sinks because plants take in carbon dioxide — and some scientists think they can even boost that ability. (discovermagazine.com)
For example, in higher latitudes such as northern Canada and Greenland, coastal waters usually act as carbon sinks, absorbing excess carbon dioxide from the atmosphere. (sciencedaily.com)