We can dance around proximal causes all we want, but all environmental roads lead to overpopulation.
Most people associate acting on population with China forcing abortions or tearing down homes, or racist eugenics policies or forced sterilizations.
That's why when I talk about overpopulation, I talk about success cases like Thailand. Or how Mexico's soap operas helped lower that nation's birth rate. These cases brought prosperity, stability, and abundance.
When they say we need more people to create more minds to solve bigger problems, I point out the geniuses have already been born and they said the population was too high. Besides, what was the world population that produced Beethoven and Shakespeare. Einstein was born to a population below 2 billion. Buddha and Jesus lived below 1 billion.
The greatest technologies to solve our environmental problems aren't solar powered planes, thorium, and rocket ships. It's IUD, vasectomies, and other tools of family planning, along with educating everyone about it.