by Anthony Watts, May 2, 2019 in WUWT

At first, I thought this had to be a joke. Then I thought it must be some sort of misinterpretation. Sadly, no.

From the website Afrinik, quoting the book –Scener ur hjärtat by Malena Ernman, Svante Thunberg:

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Of course, with a ~ 410 parts per million concentration of CO2 in the atmosphere, we know that is a physical impossibility. Carbon Dioxide is a colorless and odorless gas:

Source:
http://www.ces.fau.edu/nasa/module-2/how-greenhouse-effect-works.php