What do you think of an overcrowded world? I'm sure no one wants that. The world is a problem of inverse proportion, increasing population means decreasing land and food. When our world becomes overcrowded and cramped, people will no longer have enough food and shelter. When the population is crowded, there will be more slums, people do not have enough living conditions, jobs, and become criminals; The proportion of the population living in poverty will increase, more beggars and homeless people will increase; industrial plants and vehicles will become more common; environmental pollution will adversely affect the earth's climate and human health; environmental pollution also makes the arctic ice melt faster causing natural disasters and constant floods; ... and many more disasters you can't imagine. So reducing the natural growth rate in countries is a big problem for countries all over the world.
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