The global CO2 production dwarfs what you could do with trees, I'm fairly certain even if we planted a tree on every square centimeter available, it would not be sufficient to counter our production sufficiently.

What we need is to invest in technology to reduce CO2. Nuclear fusion/fission, solar, wind, electric or alternative fuel cars, redesign CO2 industry processes, etc.

The petrol and coal industry would have to go entirely bankrupt. No exceptions.