People were already wrecking the climate 140 years ago — we just lacked the know-how to spot it
Nature reports: How early in Earth’s history would scientists have been able to detect human-caused climate change if they’d had the proper technology? That’s the subject of a thought experiment published by researchers today in Proceedings of the National Academy of Sciences. he answer: “As early as 1885,” says study co-author Benjamin Santer, an independent climate scientist based in Los Angeles, California. That’s when researchers could have “confidently disentangled” a human-caused signal of climate change from natural variations, or noise,…