Co2 levels and vegetation growth

On my bush block dominated by Eucalyptus trees, the canopies look the best I can ever remember. They are full of large glossy new leaves.

We had a very wet winter and spring, so much so that when we buried our cat, the hole that we dug, approx 60 cm down had very damp clay, and that was in the middle of summer. I think its fair to say that water plus CO2 allows plants to grow faster.

But nothing is ever straight forward. Im no scientist but am a very keen observer of my environment.
Im very curious about how the ever increasing levels of CO2 are contributing to vegetation growth.

An ABC report from 2010 talked about some negative side effects from increased vegetation growth as a result of increased atmospheric CO2.

• Some plants increase that amount of toxins in their leaves to reduce palatability
• Other plants reduce the amount of proteins in the leaves

For native fauna who rely on already fairly impoverished vegetation especially Koalas this might have really negative consequences.