Question

Why did the population double in 1999 ?​

Answer 1

Answer:

Population becomes double in 1999 because of better food supplies medicine while the number of birth remains still high

Answer 2

Answer:

In 1999, less than 30 years letter , the population doubled to 6 billion . The main reason for this growth was that with better food supplies and medicine, deaths were reducing ,while the number of births still remains fairly high.