Evidence That Environmental Legislation Has Had a Positive Impact on Air

Multiple Choice

Evidence that environmental legislation has had a positive impact on air quality would not include

A) decreases in carbon monoxide by over 50%.
B) declines in lead emissions by nearly 95%.
C) a decrease in all criteria air pollutants.
D) lower concentrations of ozone in all parts of the US.
E) reduction of pollution from cars by 60 to 80%.