What will be the population of Tianjin according to the U. N. estimates? [br] [

The UN estimates that the population of the Beijing metropolitan area will be approximately 12 million, and that of Tianjin will be 7 million.

Around 380 million years ago, only 300 species groups were left in existence. And still, the earth remained. It would’ve survived if only 250 or 200 groups had lived, or even 100.