[throwaway_98554]

No, you are limited the number of children you'd have.

You can have a much bigger effect by getting rid of OTHER people.

Limiting your own consumption is completely counter-productive, as it leaves the resources to be consumed by those who do not share the same worries. They will simply have more resource available to increase their number and influence. (It's similar to those worrying about overpopulation and deciding to not having children : it's simply making sure the genes of those worrying won't make it to the next generation.)

In a non-policed commons situation, the only time it makes sense to try to shame people into consuming less is if they are your competition and you want to get rid of them.

[User23]

To be fair to grandparent, he or she did say to reduce one's own impact. Eliminating others will not achieve that.

The future belongs to whoever shows up for it. Here are the current likely winners: https://population.un.org/wpp/Publications/Files/WPP2012_HIG...