Friction or fiction? | AspenTimes.com

Friction or fiction?

Dear Editor:

Auden Schendler wrote, “Muller found that the planet was warming and that the warming is human caused” (“The facts are in on global warming,” Dec. 14, The Aspen Times).

So what was the human cause of “global warming” when humans were living in caves, wearing animal skins and hunting/gathering with sticks and stones and the planet was warming and cooling?

Just curious!

Michael Galvis

Woody Creek

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