Below are some of the causes of population explosion. Put them in order of importance and explain why. (Dưới đây là một số trong những nguyên nhân bùng nổ dân số. Đặt chúng theo thứ tự tầm quan trọng và giải thích tại sao.)
Fewer children die at birth.
People are not aware of the problem of overpopulation.
People are not properly educated.
People believe that having many children means happiness.
Religion doesn't encourage people to have fewer children.
Many people believe that having a large family is a form of insurance.
1. Fewer children die at birth.
2. Many people believe that having a large family is a form of insurance.
3. Religion doesn't encourage people to have fewer children.
4. People believe that having many children means happiness.
5. People are not aware of the problem of overpopulation.
6. People are not properly educated.