Therein lies the rub. Once the warmageddon cult left got to the point of quantifying each step of their religious practices, they justify in their minds and their regulations how much is "needed" for each "gain". "Net zero" makes no sense to those of us with sense. But it clicks in their brains because they've build a "math" around how to get there.
Almost any sect, cult, or religion will legislate its creed into law if it acquires the political power to do so, and will follow it by suppressing opposition, subverting all education to seize early the minds of the young, and by killing, locking up, or driving underground all heretics.
ROBERT A. HEINLEIN, attributed, Religion in Science Fiction: The Evolution of an Idea and the Extinction of a Genre