The mitosis or the mitochondria
Although, I'm not sure about the entirety of this question, when reviewing claims and evidence, check your sources to make sure they are reliable.
Overpopulation can lead to overuse of resources, extreme pollution, war, plague, starvation, and many more serious world problems
The answers are - creating laws to regulate the amount of pollution, -planting trees at the same rate they are being cut down, -teaching citizens about water consumption and waste.
All three of these measures help people understand the importance of sustainability as well as ensure that on a governmental level, the required steps are being taken that a nation will witness increased dependance on renewable energy sources and not fossil ones.
