SebastiaanChamp
I will not repeat all the suggestions already made by many of us, as I fully agree with most of them.
A thing that I want to add: why is the label underneath the middle circle "CO2 SAVED"? I don't see how an amount of trees EQUALS saving an amount of colorless gas. A more meaningful label would be "TREES PLANTED", but that would of course break with the "SAVED" spree underneath all three bubbles, and is way less catchy.