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I don't like this analogy.

You can show a picture of an asteroid, but you can't really explain the greenhouse effect to consumers and voters.

It's easy to take action against an asteroid, but fighting CO2 emissions is far trickier.

I believe you could explain greenhouse effect to consumers and voters. The basics are elementary/highschool physics and chemistry. And there are useful analogies too. The issue is that schools in too many countries don't seem to try to explain mechanisms of climate change to pupils.

> It's easy to take action against an asteroid, but fighting CO2 emissions is far trickier.

Really?

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