Carbon offsetting – the act of paying someone else to deal with your carbon emissions on your behalf.
Having a baby – often said to be one of the most massively enviromentally damaging things a couple can do.
I have no plans to have a child of my own.
I therefore propose that people who promise never to have children should be able to “sell” the carbon they do not consume through procreation to parents who wish to offset the enviromental impact of having a baby.
Could be quite a financial windfall :)