Wired Cola

Somebody at work asked me about a joke I made: that I was going to turn a profit on my cycling to work by selling the carbon offsets.

That led to a long digression about the nature of emissions trading and carbon offsetting (Al Gore was discussed), and I promised to write a little post about it.

As it happens, Wikipedia (surprise) has already got a very good article which would say most of what I was going to say as a primer on the subject.