Fix grammar errors in this sentence: Nowadays, many countries have to face different problems about aging population.
The United States has a population of 300 million people, but it is expected to reach 300 million people by 2050.
In this case, the word “population” is used as a noun, and the word “population” is a verb.
The word “population” is a noun, and the word “population” is a verb.
The word “population” is a noun, and the word “population” is a verb.
The government of, which is a country in Africa, is facing a crisis.
The government of the country of the United States of America is facing a crisis.
The United States of America is facing a crisis.
The United States of America is facing a crisis.
The United States of America is facing a crisis.
The United States of America is facing a crisis.
The United States of America is facing a crisis.
The United States of America is facing a crisis.