“Climate Feedback”
The best way to “save the planet” is to reduce the population.
These folks have no interest in saving lives—their goal is to end them.
This also explains so many other cultural movements, all of which aim for sterility of one kind or another. It is interesting that many of the very wealthy class hold such Malthusian views for others, but not for themselves and their own families.
For them "be fruitful and multiply" is their enemy, while feeding a "Moloch" in one form or another is their god.