Problems of overpopulation:
1. To survive, people need food and drink. In addition to dry throats, many stomachs are growling. The pressure on food supplies is growing. More than 800 million people in the world go hungry - two billion suffer from malnutrition. More at World Hunger.
2. If a person grows up in an environment where medical care, hygiene and food supply are inadequate, they are more susceptible to diseases. These can also spread more quickly there. As today's situation also shows with Corona.
3. People travel from A to B - whether just to work or halfway around the world on vacation. With each additional person, more cars, scooters and other high-emission vehicles are produced and driven. More under air pollution.