reduction in population growth. there's been lots of research in how much it would improve quality of life because of resources and such. But there are obvious, and she was clear to also state them, ethical issues with the execution of such a thing.Didn't she advocate for the elimination of the human population down to like 450 million people?
It was more a statement about how it would be an idealistic approach to climate and concerns as we could produce enough food and everything with out having so much of a negative impact on the planet is for it not to be able to keep up.
I also think it has something to do with when the human population got bit over that line we saw a major increase in man-made extinctions of species