Extra CO2 doesn't necessarily mean extra trees. Especially where a lot of land is desert, tundra, rocky mountains, etc. You need both water and soil. Then you have humans already occupying a lot of land and farms where plant growth is controlled.

There's a lot of conflicting info with climate change, but it does seem like the media/oligarchs are purposely trying to get the population to panic about it. But that doesn't necessarily mean that an accelerated increase in CO2 may not have some damaging effects.