From a world population of 3 billion some 40 years ago, the present number of inhabitants has reached 7 billion. If the trend continues then we may be having 15 billion people 40 years from now. Can you imagine what kind of place we would have with the doubling of the population? It is not only the crowded places but the shortage of natural resources. Food will surely be a problem since farms will be fewer, livestock will have no pasture and fishes will also suffer with over-fishing.
Only China has the political will to impose population control to their citizens. The one-child policy for a couple is still enforced. It may have led to the unprecedented progress of China although the pro-life adherents would not agree. Whatever the politics there is, we have to admit that the earth has a limit on everything and one of them is population.
Is your place crowded?