[Johnjonjoan]

But increased CO2 is strongly linked to the greening effect.

>Studies have shown that increased concentrations of carbon dioxide increase photosynthesis, spurring plant growth.

>Results showed that carbon dioxide fertilization explains 70 percent of the greening effect, said co-author Ranga Myneni, a professor in the Department of Earth and Environment at Boston University. “The second most important driver is nitrogen, at 9 percent. So we see what an outsized role CO2 plays in this process.”

https://climate.nasa.gov/news/2436/co2-is-making-earth-green...