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Ozone Alert in New York City: We warn children, the
elderly and people with heart and lung conditions to keep off of city
streets until air quality has improved. We suggest that motorists might use mass transit.

Ozone Alert in Italy, Germany, and other European Union cities: They ban cars, trucks and scooters from city streets until air quality improves, putting the onus on polluters rather than those most vulnerable to the pollution.

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