As to the role of rainforests as Carbon "sinks" -- notwithstanding the present scientific uncertainties concerning the overall process of climate change and CO^2 circulation -- it can safely be said that worldwide reforestation or afforestation in all areas available for it can only "take up", in numerical terms, a very small part of the present and historical emissions of CO^2 (we should remember that the concentration of greenhouse gas in the atmosphere is the result of a very long term process of the order of 100 -150 years).
(Carbon; sinks; ) (the present scientific uncertainties; concerning; the overall process of climate change and CO^2 circulation) (we; should remember; that the concentration of greenhouse gas in the atmosphere is the result of a very long term process of the order of 100 -150 years) Context(we should remember,List([382, 400))):(the concentration of greenhouse gas in the atmosphere; is; the result of a very long term process of the order of 100 -150 years)
we should remember,List([382, 400))
Carbon the present scientific uncertainties we the concentration of greenhouse gas in the atmosphere
sinks concerning should remember is
the overall process of climate change and CO^2 circulation
that the concentration of greenhouse gas in the atmosphere is the result of a very long term process of the order of 100 -150 years
the result of a very long term process of the order of 100 -150 years