for business its difficult to meet the demand of so many customers which means they have to produce products at a higher rate. in mass factories this contributes to pollution and therefore global warming. furthermore, in urban areas it's hard to build enough houses / apartments for this many people, which leads to homelessness
Overpopulation puts a tremendous strain on resources. If too many people live in a place with too few resources (food, water, etc.), there are many negative effects. ... A lack of fresh water can lead to unsanitary living conditions, which can cause disease, infection and increased child and infant mortality.
One of the reasons why some leaders believed that unicameral legislatures created more democratic governments was because bicameral ones often led to gridlock and political hardship. Hope it helps
