That would actually be illogical for an individual to do if they're mostly interested in themselves and their offspring (and people do it which shows how generous some people are, sacrificing themselves for the greater good). A single person giving up 1/8 of their income for the benefit of everyone instead of themselves is just putting themselves at an economic disadvantage. Those are resources that can't be put towards better education for their kids, buying bigger/newer (i.e. safer for themselves) vehicles, etc. This kind of stuff will only work if we agree as a society that everyone has to play along by the new rules, for the benefit of everyone as a whole. A lot of people are completely against this idea (government intrusion on freedom, etc.) but that's the only way we've ever solved problems based on the "tragedy of the commons". If there's a common resource that people have an incentive to exploit, with no limit, for essentially free (e.g. the atmosphere) then they will do it. Sure, we all breath, but there's little/no incentive to breath "more". We can, however, use more energy by burning inexpensive fuel which consumes O2 and releases CO2 into the atmosphere, and we don't, as individuals or as companies, have to pay for that "externality". Therefore we will *never* stop doing it until we all agree as a society to regulate CO2 emissions.
