15 January 2008

Trees Giving Up CO2 Battle, Soil is the answer

I've been hearing about this quite a bit lately since the first bit of research a couple of years ago, I think, showed that maybe trees had only so much carbon capacity and that rising temperatures might be reducing it. The article, Trees Giving Up CO2 Battle, But Sustainable Farming Offers Hope (at Celsias) precises a recent report: "The ability of forests to soak up man-made carbon dioxide is weakening, according to an analysis of two decades of data from more than 30 sites in the frozen north." and goes on to interpret a bit: "The finding published today is crucial, because it means that more of the CO2 we release will end up affecting the climate in the atmosphere rather than being safely locked away in trees or soil."
But there may be help at hand for this downheartening news.
"The world’s soils are the earth’s second largest carbon sink (next to the oceans). As we’ve shared before, proper soil management is a powerful and highly effective method of removing carbon from the atmosphere, as well as reducing fossil fuel use, reducing toxic chemical use and runoff, improving plant (and thus human) health, and more (actually, a lot more if we also simultaneously incentivise the relocalisation of our markets)."
Yes folks, back to terra preta and organic farming: one of the deleterious effects of oil has been fertilisers. Short-term great, but long term results in thinning and denaturing the soils which can then only be kept somewhat productive by more oil-derived products. We've been eating oil and it's going to have to stop. So actively trying to build up our soils is an important way forward and doubly so since the trees are less capable than we thought.

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