Without context this link is just bad. Plant growth will not reduce CO2 levels because biosphere is temporary store or carbon (since it is a part of the carbon cycle)

We are putting carbon (into the atmosphere) that was previously buried. So putting a tiny bit of it back into plants doesn't help because:

• those plants will die and release the carbon back
• the number of plants added is inconsequential compared to the deforestation
• the number of plants needed to offset additional carbon is humongous