I heard a story on the radio today about these things called "carbon offsets." The way it works is, you figure out how much carbon dioxide you are responsible for spewing into the atmosphere and buy an "offset" from a carbon broker who assures you that your money goes toward some project that will reduce greenhouse gases by that amount.
One of the projects is planting trees.
Why didn't I think of this before? Like an idiot, I've been working three jobs to earn money for plants (plus incidentals like food and mortgage payments) when I could be charging money for the privilege of buying shrubs for my garden...er...the "project site.". (I don't really need any more trees, but I'm pretty sure that Viburnums and Beautyberries absorb carbon dioxide too.)
Now, how do I set up a Paypal account?