Increased CO2 also causes de-desertification.
Plants open their skin pores to inhale CO2, an essential food for them. But open pores mean they lose water through those pores. So the more CO2 in the air, the less they need to open them, and the more water they retain.
If they don’t need to uptake water, it stays in the soil and can support more plants. And arid land becomes fertile.
Yes.
This means we also need less water for irrigation purposes.