It’s Hotter Than Ever, Thanks to Us
The Earth has been warmer since 1980 than it was at any time in the last 2,000 years. Scientists have reconstructed past climates from ice cores and tree rings, and say this is proof that human activities are changing our weather. U.K. researcher Philip Jones says, “It just shows how dramatic the warming has been in recent years. You can’t explain it in any other way?it’s a response to a build-up of greenhouse gases in the atmosphere.”
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