Why did the world's population grew?

Answer 1

Simply because there are more people born each year than die ! It doesn't matter whether its the human race, or a herd of cows - if there are more births than deaths, the population will increase.

Answer 2

Because every year there is better and better technology which allows scientists to make better medicine and cures for diseases. This allows more people to live longer and longer. Also because the farmers are using technology to grow more food and faster, so that there are not many starving people which allows people to live long

Answer 3

A higher birthrate coupled with a lower deathrate.

Answer 4

you've obviously a virgin.