Given that I was already uncomfortable with the negative effect my holiday was going to have on the environment, I was really interested in the idea. The travel agent this morning informed me that it would cost $180 (equivalent to approximately 5 tonne of gas) - more than expected, but I bit the bullet without too much thought.
The idea of individuals being responsible for (and neutralising) the greenhouse gas they directly or indirectly produce is one I strongly support. Anyone who can afford a holiday, can also afford to offset it. According to the last explanatory step on the carbon offsetting process:
5. You feel bloody fantastic because you've made a positive change to the environment.
But I don't, because I haven't. I've just stopped feeling uneasy about the fact that my beloved holiday, that I can afford because I am fortunate, isn't further destroying the environment.
More info.