More abortions=Less babies=less people=less consumption=less manufacturing=less pollution=ending or slowing climate change.
If climate change is manmade the logic seems correct to me they've just got to apply it to places like India, Africa and China.
The more innocent souls you can sacrifice to the Lord of this World, the more the world will begin to contort itself to your will. Or something like that. IDK
I'm sure if you look at enough protest footage when roe v wade was overturned you may find a sign that can answer that, which was promptly discarded like an unwanted fetus.