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Farming with crops and rocks to address global climate, food and soil security
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Journal Article
Farming with crops and rocks to address global climate, food and soil security
2018
Overview
The magnitude of future climate change could be moderated by immediately reducing the amount of CO
2
entering the atmosphere as a result of energy generation and by adopting strategies that actively remove CO
2
from it. Biogeochemical improvement of soils by adding crushed, fast-reacting silicate rocks to croplands is one such CO
2
-removal strategy. This approach has the potential to improve crop production, increase protection from pests and diseases, and restore soil fertility and structure. Managed croplands worldwide are already equipped for frequent rock dust additions to soils, making rapid adoption at scale feasible, and the potential benefits could generate financial incentives for widespread adoption in the agricultural sector. However, there are still obstacles to be surmounted. Audited field-scale assessments of the efficacy of CO
2
capture are urgently required together with detailed environmental monitoring. A cost-effective way to meet the rock requirements for CO
2
removal must be found, possibly involving the recycling of silicate waste materials. Finally, issues of public perception, trust and acceptance must also be addressed.
To reduce climate warming we must stop adding CO
2
to the atmopshere, and develop approaches for removing it. Adding crushed, fast-reacting silicate rocks to croplands could improve productivity, restore soil quality and reduce atmospheric CO
2
.
Publisher
Nature Publishing Group UK,Nature Publishing Group
Subject
