I think reading the article always helps. > The researchers grew two types of famine weed, one invasive and the other non-invasive, and exposed them to the atm

I think reading the article always helps. > The researchers grew two types of famine weed, one invasive and the other non-invasive, and exposed them to the atmospheric levels of carbon dioxide recorded in 1950 and 2020. In the invasive variety, parthenin concentrations peaked at the highest carbon levels