Researchers: Earth was warmer 2,000 years ago

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So the Romans did have internal combustion engines and run factories that belched pollution? I’m confused. How could it have been warmer back then when modern man is supposed to be to blame for “global warming”? Unless, of course, man isn’t responsible and the earth is always warming or cooling. From the Daily Mail:

How did the Romans grow grapes in northern England? Perhaps because it was warmer than we thought.

A study suggests the Britain of 2,000 years ago experienced a lengthy period of hotter summers than today.

German researchers used data from tree rings – a key indicator of past climate – to claim the world has been on a ‘long-term cooling trend’ for two millennia until the global warming of the twentieth century.

This cooling was punctuated by a couple of warm spells.

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