I dont think we should drive ourselves to extinction by not having kids. But we could have a more integrated relationship with the earth and its other species, where we value them in their own right, rather than for resources. Its more about the belief pattern relating to our place on the earth that needs to change, rather than our actual place on the earth.

I certainly dont want my own children but if I ever decide that I do want kids in my life, I will adopt, because thats a person that is already on this earth. Its an interesting one from a demographic point of view because Im a Western white woman living in a fairly affluent area, and I have access to far more globally impacting things - such as a car - than a woman in Sudan, for example.

So if I adopted a child from a country like that, I would be taking a child who might not pollute the planet and bringing them into a situation where they could. But if I were to adopt a child in the UK, that child would probably go on to have an impact on the world anyway, and I would hope that, through my influence, they would reduce their burden on the planet as much as they could.

The rest is here:

Childfree: Im not having children because I want to save the planet - Stylist Magazine