Originally Posted by merlinextraligh

It would actually be a positive because you're slowing the rate of increase in atmospheric C02. The years that cannisters of C02 sit in your saddle bag, or on your work bench before they eventually get put in a tire decrease the total amount of C02 in the atmosphere, compared to immediately releasing it into the atmosphere.

As long as you replace your C02 cartridges when you use one, we are all creating a large C02 sequestration bank.

Hell, I bet collectively its worth switching to a Prius or two.