It took hundreds of thousands of years for t...

Câu hỏi: It took hundreds of thousands of years for the world population to grow to 1 billion. However, in just another two centuries, it grew sevenfold. You know, in 2011, the total population of the world reached 7 billion. And today, it's about 7.5 billion. Tokyo, with 37.8 million residents, continues to be the largest city in the world in terms of population.

A. Causes of population growth

B. Population explosion

C. Consequences of population growth