I'm also surprised at the increase of world's population and I think Japan is happy country, too. But, whether population increase or decrease is different in each country. Some countries, especially developing countries, increase its population. These countries don't have good medical treatment, so many of newborn babies die. Besides, many people need as much worker as possible to earn their living, Therefore, people who live in deveoping country raise a lot of children and these countries' population increase. On the other hand, several developed countries will decrease its population in the future. Japan is one of them. These countries have good medical treatment, and their life is rich, so they don't need to many children to work. And then its population will decrease.
Although increasing population too much isn't good, decrease it too much isn't also good. I don't want to disappear Japanese.
