Where is the proof that CO2 warms the Earth?
Imagine that someone asks you to prove that the Moon orbits around the Earth because it is pulled by the force of gravity. Your first reaction would be to say something like “huh?” But – assuming you are in a good mood – you might try to explain how Newton’s law of universal gravitation works and how it can be used to describe the moon’s trajectory.
“Then,” your opponent could say, “is it correct to say that nobody ever measured the gravity pull of the Earth at the Earth-Moon distance?”
“Aw… No. What for? It would be terribly expensive. And useless, too.”
“So, you have no proof that the Moon goes around the Earth because of gravity. Can you prove that the Moon is not being pushed by invisible angels, instead?”
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