Every population has a limit. Populations cannot go on forever. There are things that prevent it from becoming possible. For example you need time, space and resources. Humans will eventually run out of these things. For example, we don’t have enough resources to last us forever. Like eventually there won’t be enough food, water and oxygen. And there definitely won’t be enough space. If the human population kept on growing and growing and growing there wouldn’t be enough space on earth.  And we won’t have enough time because the time we do have is  probably how much time the resources will last.

Below is a graph for how many people are on earth over the years.