birth.
here are some examples of population growth from 1985 to 2000 (as anticipated).
lima had 5.7 million people in 1985 but there were 9.1 million by 2000. tianjin used to have 7. 9 million in 1985. by 2000 its population reached 9. 7 million. such cities as london, osaka, moscow, beijing, karachi, delhi, jakarta, seoul, and teheran are having a similar population growth. we would not be shocked if all other cities have this rate. but some cities, like calcutta, shanghai, new york, and sto paulo boost their population even more quickly than the above-mentioned cities. tokyo had 18.8 million in 1985. the year 2000 found 20.2 million tokyo citizens. mexico city had 17.3 million people in 1985, but as population specialists had predicted, that reached 25.8 million in 2000 !
the population problem is a universal concern nowadays. any government is a failure if it does nothing about its population growth.