Enhancement of natural carbon sinks

Finally, CO2 reduction can be obtained by enhancing natural sinks on land. Ending deforest­ation by 2055 and replanting some 250 million hectares of tropical forest, or a slightly larger area of plantations, would produce one wedge. When land is tilled for replanting, about half of the stored carbon in the soil is lost, mainly through aeration. Extending conservation tillage, in which seeds are planted without re-ploughing the land, to all the world’s cropland, coupled with using ground cover crops that help prevent soil erosion, would provide a further wedge.

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