Once known as the “City of Smoke,” Pittsburgh has come a long way since the days when filthy air turned downtown streets dark at mid-day. But in struggling communities near the remaining steel plants, high levels of air pollution persist.
The air in India's capital region becomes very polluted every winter. Vehicular and industrial pollutants, crop burning, and weather conditions cause the problem. Despite numerous initiatives, the problem has persisted.
If you’re one of millions of Americans exposed to air pollution, you may be at a greater risk of catching the coronavirus — and of having a more severe infection.
