Could diamond dust help protect us from global warming?

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Scientists have long tossed around the idea of battling global warming by injecting sulfate aerosols—little drops of sulphate—into the sky. It’s a risky solution that might backfire.

Mother Jones explained back in March that the idea started as something of a lark. In the early-1990s, Mount Pinatubo erupted in the Philippines, sending sulphates into the air that had a temporary cooling effect. A few years later, climate scientist Ken Caldeira set out to disprove that...

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