Self-study
Over the last few decades, public outcries against pollution have brought about stricter regulations of emissions. ███ ██████ ████ ███ ███ ████ ████████ ███ ██ █████ ███ ███ ████ ███████ ████████ ███ ████████ ████ █████ ███ ████ ████████ ███████ █████ ████████ ████████████
Summary
Over the last few decades, public outcries against pollution caused stricter emissions regulations.
These regulations caused greatly improved air quality in the cities that had the most polluted air 30 years ago.
Very Strongly Supported Conclusions
Public outcries contributed to greatly improved air quality in the cities that had the most polluted air 30 years ago.
4.
Which one of the following ███ ██ ████████ ████████ ████ ███ ██████████ ██████
a
In the city ████ ███ █████ ███ █████████ ██████ ███ ███ ███████ ██ ██████ ████ ██ ███ ██ █████ ████
Unsupported. We only know that the air quality is better in the cities that had the most polluted air 30 years ago. We don’t know anything about the city with the worst air pollution today.
b
No city has █████ ███ █████████ █████ ████ ██ ███ ██ █████ ████
Unsupported. We only know that the air quality is better in the cities that had the most polluted air 30 years ago. There might be some other cities in which air quality has gotten worse.
c
Most of the ██████ ████████ ███████ █████████ ████ ████ ██████ ██ ███ ██████ ████ ███ ███ ████ ████████ ████
Unsupported. The cities that had the most polluted air greatly improved, but this doesn’t necessarily mean that most of the public outcries came from people in those cities.
d
The most polluted ██████ █████ ███ ███ ███ ██████ ████ ████ ███ ████ ████████ ██ █████ ████
Unsupported. The air quality is better in the cities that were the most polluted 30 years ago, but these cities could still be the most polluted cities today.
e
Public criticism led ██ ██ ███████████ ██ ███ ███ ███████ ██ ███ ██████ ████ ███ ███ ████ ████████ ███ ██ █████ ████
Very strongly supported. Public criticism led to stricter emissions regulations, and those regulations led to improved air quality in cities that had the most polluted air 30 years ago. So, public criticism led to this improvement.