1. A geographic region or district that has been contaminated by pollutants such as industrial waste, vehicle emissions, chemicals, or other harmful substances
The factory closure helped improve the air quality in the polluted area.
O fechamento da fábrica ajudou a melhorar a qualidade do ar na zona poluída.
2. A region where environmental contamination poses health risks to residents and ecosystems
The government invested in cleanup efforts for the polluted zone near the harbor.
O governo investiu em esforços de limpeza para a zona poluída perto do porto.