Which policy statement describes leaving a car at home one day a week to reduce air pollution in Mexico City?

Which policy statement describes leaving a car at home one day a week to reduce air pollution in Mexico City?

• A. Leave car home one day a week
• B. Increase industrial emissions
• C. Expand highway capacity
• D. Use more coal power plants

Answer: (D)

Reducing emissions at the source is the way to lower urban air pollution. Leaving a car at home one day a week directly cuts vehicle trips, so fewer exhaust pollutants—like nitrogen oxides and fine particulate matter—are released on that day. In a crowded city such as Mexico City, cars are a major pollution source, so this policy immediately lowers pollution on the day it’s applied and helps improve overall air quality. The other options would not achieve that improvement: increasing industrial emissions or relying more on coal power plants would add pollutants, while expanding highway capacity can encourage more driving and often leads to higher overall emissions.

Reducing emissions at the source is the way to lower urban air pollution. Leaving a car at home one day a week directly cuts vehicle trips, so fewer exhaust pollutants—like nitrogen oxides and fine particulate matter—are released on that day. In a crowded city such as Mexico City, cars are a major pollution source, so this policy immediately lowers pollution on the day it’s applied and helps improve overall air quality. The other options would not achieve that improvement: increasing industrial emissions or relying more on coal power plants would add pollutants, while expanding highway capacity can encourage more driving and often leads to higher overall emissions.