Not sure what can be done about it. I guess mother nature will sort that out once we run out of resources. It will be like a defensive reaction of an organism, human race might just get purged from the Earth.
All you have to is educate women and give them reliable access to birth control.
In every country where women are empowered to control their own lives and their own fertility, they have chosen to have fewer children.
We don't need some horrible Malthusian resource crunch, we just need feminism.
The fertility rate in China is massively below replacement at 1.57 births per woman. India is barely above replacement at 2.4. The fertility rate in India today is lower than the fertility rate was in the US in 1970. The global fertility rate has halved in 50 years. Even in the poorest countries in sub-Saharan Africa, the fertility rate is declining. The fertility rate in Rwanda has more than halved from 8.4 in 1980 to 3.8 today. As far as I can ascertain, Niger is the country on earth with a persistently high fertility rate.
Population growth is a solved problem.
I don't think the idea is "extra credit", but rather a matter of scale changing the nature of the problem, just as you wouldn't directly compare the problem of networking 10 computers to the problem of networking 1000 computers.
> "The 1950s census showed that China had 557 million people, and some professionally-trained demographers began urging that policies be put in place to limit population growth. Mao Zedong condemned such views on the grounds that under socialism a large population was a great resource, not a threat. Consequently, some of the most prominent proponents of birth control were labelled rightists and removed from power… by the time Mao died in 1976, China’s population exceeded 900 million."
-Ebrey, Patricia Buckley (2010). The Cambridge Illustrated History of China, p. 327.
In the future, we will likely see an even larger devastation of the environment from India and other countries with large and growing populations.