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Basically, carbon sinks are holding tanks for carbon or carbon compounds, like carbon dioxide (CO2). One of the largest reservoirs of carbon is the Earthâs hard rock crust. Over the eons sedimentary rocks were formed that contain loads of carbon compounds, including the hydrocarbons that we now use as fossil fuels.
Biogradska forest in Montenegro. Credit: Wikipedia. (Phys.org) âA team composed of researchers from several European countries has found that, due to aging forests and deforestation, Europe's forests appear headed for a carbon sink saturation point much earlier than anticipated.hese regrowing forests have shown to be a persistent carbon sink, projected to continue for decades, however, there are early signs of saturation. Forest policies and management strategies need revision if we want to sustain the sink. Journal reference: Nature Climate Change.