“My daughter can see CO2 with the naked eye”
According to her mother Malena Ernman (48), 16-year-old Swedish climate activist Greta Thunberg can see CO2 with the naked eye.

She writes that in the book ‘Scenes from the heart. Our life for the climate’, which she wrote with her family.
https://www.afrinik.com/my-daughter-can-see-co2-with-the-naked-eye/