Question

chapter 20:
environmental issues
latin america
save the environment
as countries grow in population and add more factories and businesses, they often face serious challenges to their environment. one of the most important issues facing latin american countries today is how to maintain a clean, healthy environment amid rapid growth.
air pollution in mexico city
mexico city, mexico, is a huge city with a serious air pollution problem. in fact, mexico city is one of the most polluted cities in the world! people living there are exposed to toxic gases and chemicals in the air they breathe every day, which can lead to respiratory illnesses.
mexico city’s pollution is caused by emissions from factories and automobiles that build up over the city. mountains surrounding mexico city are like walls that trap the pollutants in a brown haze called smog. the wind is not strong enough to blow the pollutants over the mountains, so they continue to accumulate each day.
the mexican government has put measures in place to help reduce the air pollution. they include a program limiting how often you can drive your car, strict inspections of emissions systems on cars, and changing the kind of fuel cars and factories use.
key concept check - point
circle the correct answers.

1. what type of pollution does mexico city face?

a. water
b. soil
c. air

1. emissions in mexico city come from:

a. cars
b. factories
c. schools

1. what traps pollutants above mexico city?

a. airplanes
b. rivers
c. mountains

1. in mexico city, you might not be allowed to drive your car every day.

a. true
b. false

Explanation:

Question 1

The text under "Air Pollution in Mexico City" states that Mexico City has a serious air pollution problem. So the correct answer is related to air pollution.

The passage says "Mexico City’s pollution is caused by emissions from factories and automobiles". So emissions come from cars (automobiles) and factories, not schools. Options A (cars) and B (factories) are correct. But since it's a multiple - choice (assuming we can choose multiple or the question expects the relevant ones), the relevant options are A and B. If we consider the options given, and the text, both A and B are sources of emissions.

The text mentions "Mountains surrounding Mexico City are like walls that trap the pollutants...". So mountains trap the pollutants above Mexico City.

Answer:

C. air

Question 2