Wasteful consumption makes overpopulation seem like a bigger problem than it is. There is evidence that the population is starting to stabilize and may even decrease after 2060ish. The total fertility rate in almost all developed nations plus china is actually below the replacement rate of 2.1(2 to replace parents .1 for those that will never have children of their own). Many of these nations have already aged beyond natural population growth and short of massive immigration will see a population decline in the next century.
Even in America where there is "healthy" population growth the evidence points to a stabilizing population. American population growth and fertility rates are pushed up by latin American immigration and immigrant birth rates. A trend that is itself slowing drastically.
The graph above is a fairly accurate depiction of fertility rates in population rich India. These countries will continue to grow but most of it will be from "momentum". As their populations age we will likely see similar stability or decline that Europe and Russia are facing in the short term.
There is still a young population and a high TFR in Africa but they have started to trend down as well. If their declining fertility rates follow the trends seen elsewhere it is likely that they will approach the replacement rate within just a few decades.
global fertility rates since 1950