New analysis removes all doubt about the cause.
You’ve probably heard it before. Climate has always changed naturally, so what’s happening now is just another cycle. The sun, volcanoes, ocean currents, surely these powerful natural forces explain the warming we’re seeing today. This sounds reasonable enough, and it’s become one of the most persistent myths about climate change.
The problem is that scientists have spent decades rigorously testing this exact hypothesis, using every tool available from ice core analysis to sophisticated computer models. What they discovered has completely demolished the “it’s natural” argument, revealing instead a clear human fingerprint on our changing climate.