They've been pushing this "Overpopulation! Dwindling resources!" nonsense for nearly a century. It's scare tactics used to control the populations of the world.
At no point in modern history has there been an issue of true food shortages. Rather, the issue we've faced is primarily borne of distribution issues and secondarily of uneducated populations not knowing how to utilize their resources. There is plenty of food to go around, but getting it to the people of Africa is another issue, people who wouldn't even need handouts if they were educated and committed en masse to the concepts introduced and available to them. I've heard stories of water wells and bridges being constructed only for the do-good westerners to leave and come back in two months to see them destroyed.
We are blessed on this planet with sustainability, both through vegetation and the ability to hunt and utilize livestock, as well as the water cycle. True overpopulation would only come in the form of the entire earth being blanketed with people living on top of each other like Tokyo. Shortages might result from overpollution, overfarming, or nuclear fallout, but those are all issues we've addressed and learned from. Fossil fuels are, in fact, limited, but if worse came to worst we do have nuclear as a true option. God has blessed us beyond comprehension, both with our provisions on earth as well as our intelligence and problem-solving being able to address any true shortages that arise.
As people are aware of this if they apply thought to the matter, they've turned to a far more effective tactic to control the populace in the man-made global warming lie. It's something far less tangible and less understood by the average citizen of the world that can't be refuted in the short-term. Projections can be off base by magnitudes and nobody is the wiser, versus overpopulation fearmongers constantly having to eat crow. So long as at least half of society buys into the lie and they maintain political power through it, they get everything they could possibly want. It's essentially the same playbook as COVID over a very long period of time with not as many people paying attention.