Lack of employment opportunities, lack of quality education, problems in maintaining peace and order condition, lack of health care and services, problems in food supply, and many more. To prevent these things to happen, we should have family planning or have a regular check up to a doctor. =p
Fast spreading diseases
Development of squatter settlements,crime and health complication
The solution: Eating babies. This would limit the growth of the population. It would also help solve world hunger.