Growing Returns

Scientists agree: Soil health matters but climate mitigation potential still uncertain

To keep global temperature increases below 1.5o Celsius — the threshold for avoiding the worst consequences of climate change — the world needs both rapid reductions of new climate pollution and removal of existing carbon dioxide from the atmosphere.

Increasing the amount of carbon stored in cropland soils is one pathway for carbon dioxide removal, and it has gained traction over the past several years in voluntary agricultural carbon markets and U.S. climate policy discussions. The idea is that farming practices, such as using cover crops, will add carbon to agricultural soils, and thus help slow climate change.

Scientists agree that agricultural soils can be part of the climate solution, but their estimates about when and how much carbon agricultural soils can store — and thus the magnitude of climate mitigation that soils could deliver — vary widely. Read More »

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