You don’t. There are about a dozen major tipping points that are slowly coming together that will make the planet unlikely to support more than a billion or two

You don’t. There are about a dozen major tipping points that are slowly coming together that will make the planet unlikely to support more than a billion or two - at best - by 2050. And likely no more than a few hundred million by 2100. Bringing a child into this world today is to doom them to an early and likely violent death as billions of climate refugees tear the world apart in a desperate struggle for survival.