Middle School Earth and Space Science Quiz
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EARTH AND HUMAN ACTIVITY
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A neighborhood complains about air pollution from cars idling in a pickup line. The school started an "engine-off" rule and put up reminder signs.
Evidence: Observers counted idling cars for 10 days before and 10 days after the rule.
Before: average 42 idling cars per day.
After: average 28 idling cars per day.
Success criteria: reduce idling cars by at least 25%. Solutions can be more or less effective.
Which statement about the solution's effectiveness is supported by the evidence?
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