Since 1961, the production of these four crops in the Northern Hemisphere has jumped more than twice, leading to absorb a billion metric tons of carbon captured and released each year.
And they invoke "Basic research" ?
So, more C02 equals more food which equals more people which equals more c02.
Without saying so directly, they are saying that people are the problem.
The earth atmosphere only has 0.038 percent Carbon dioxide so it should take Millions of years to kill us