Launching a huge dust cloud from the moon could ease global warming
Quoting Carissa Wong in the New Scientist: "Launching a million tonnes of moon dust around Earth could dim sunlight across our planet by 1.8 per cent. This would reduce the global temperature, but whether it would be worth the resources, and the risks involved in such a strategy, are unclear.
"If the approach were sustained indefinitely, or until other measures were introduced to remove carbon dioxide from Earth’s atmosphere, this could offset the rise in carbon dioxide levels that has occurred since the industrial revolution, says Ben Kravitz at Indiana University, Bloomington."
“If this method works, it would certainly be effective at reducing global temperature, but it’s hard to say whether it would be worth it relative to the effort and resources used,” he says."