This claim is not true. I mean, it's so easy to go and read withouthotair.com and see how this stuff can be calculated on the back of an envelope.

Then you can try a little bit harder and do 2nd, 3rd and other order effects and get a bit more precise estimates.

To say that a 2 ton car moving represents a tiny part of CO2 emissions and that breathing is killing the planet is ridiculous.