A high-profile study of the nascent field of geoengineering says that no amount of climate tinkering will solve the problem of too much atmospheric carbon dioxide. And schemes for spraying planet-cooling particles into the atmosphere are so technologically immature that researchers should not even try them… Proposals to study geoengineering have tended to languish because there was no obvious way for federal agencies to fund them within existing research programmes, she says. But now, the US government has a clear path forward to start thinking about doing such tests… “Hopefully this will get us an American research program,” says Alan Robock, an atmospheric scientist at Rutgers University in New Brunswick, New Jersey.
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