Eugenics? What eugenics? There is no mention of eugenics in this research paper. 
Just the eco-fascist narrative that climate change isn’t caused by capitalism, but by too many people consuming resources faster than they can be replenished. I’m sure that’s not a dangerous idea useful to anyone or anything. 
It’s obvious no serious discussion can be had here. 
The whole debate is dumb. Any idea along that lines is a political non-starter. As a species we’ll just let nature implement some form of it against our wishes and intentions. Unfortunately, that implementation will likely be the worst in terms of damage and equity. I fully expect those most guilty to suffer the least. I will definitely starve before Bezos and Musk do. The unfortunates of the global south will probably suffer more before I do which I will admit is inequitable.
I fully expect to hear, “Why did no one warn us that it would be this bad?” in my lifetime. I don’t think the answer that “They did, but everyone chose to ignore it.” will provide any comfort.