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Organic soils such as those seen here could sequester 40% of global carbon emissions. Image source: Rodale Institute stock. Global Climate Change Chaos We've overshot sustainability. Three hundred fifty parts per million (350 ppm) is the recommended safe threshold for carbon dioxide in our atmosphere. Today, at 386 ppm, we're over the limit. There is evidence that we will see ice-free summer Arctic a hundred years before IPCC estimates and we have already seen flooding in Read the full story on TreeHugger

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