Firstly, new inventions in medicine now enable us to cure the most deadly diseases and people seem to live longer. Secondly, people don't know how to control the population, especially in the countryside. They don't use any method of birth control and they don't know how to use it. Thirdly, thanks to the development of science and the help of technology, the birth rate is increasing. This is certainly a reason to be proud and happy but it is also a cause of overpopulation. Due to overpopulation, there is a high level of human activity like more travel, more vehicles, more release of sewage, etc. These issues will lead to pollution. People live in overcrowded blocks of flats with noise and the shortage of water. Every day, they have to wait a long line at the bus stops but it is not easy to get a seat on overcrowded buses. The next disadvantage is overcrowded schools which don't have enough playing grounds or study aids for students. Moreover, the larger the population is, the higher the demand for natural resources like water, land, and forests, etc. is. I think the best way to solve overpopulation is through birth control. Birth control may be the policies that limit couples to only one or two children and encourage family planning. Vietnamese government has tried to change the culture of valuing boys over girls which is especially believed by the elderly in the countryside. Therefore, couples don't need to have more children when they don't have a son. There are also family planning classes for couples to raise awareness of family planning
