A carbon offset is basically a way of paying someone else for the carbon you continue to generate. If you have taken all the steps you can to lower your personal (not business-related) carbon footprint, and still you want to do more, you may want to consider carbon offsets. Many people who must travel a lot by air, for instance, buy carbon offsets.

Offsets are tricky; there are as many methods of offsetting as there are offsetters, and there are many hundreds of these. Almost every offsetter uses a different method to calculate the carbon replaced, and not all are equally valid. So if you choose to buy offsets, be careful and conservative.