As the world globalizing, the number of population also increasing alarmingly.
the number of population => the size of population
food deficiency
food shortage
governments who facing overpopulation
over-populated countries
Firstly, one of the main issue which overpopulation is posing is unemployment. As a result of unemployment the rate of committing crime and overcrowding are picking up significantly.
You should support you idea (unemployment) with reason, but you say what unemployment can cause. nothing to do with overpopulation
To sum up, I want to recap that
sum up and recap are repeat