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Geoengineered Food? Climate Fix Could Boost Crop Yields, But With Risks

Altering the upper atmosphere could block enough sunlight to offset the warming effects of climate change and protect food crops. But what are the risks? (iStockphoto)
Altering the upper atmosphere could block enough sunlight to offset the warming effects of climate change and protect food crops. But what are the risks? (iStockphoto)

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