Chennai's coastal ecology is diverse, though the city faces significant urbanization challenges.
* **Air Quality**: Generally ranges from 'Good' to 'Moderate'. It benefits from the coastal sea breeze which disperses pollutants, though AQI can worsen during winter mornings or festive seasons. * **Water Ecology**: The city is flanked by the Bay of Bengal and intersected by the Cooum and Adyar rivers, both of which have faced heavy pollution but are undergoing long-term eco-restoration projects. * **Protected Areas**: Remarkably, Chennai has a national park within its city limits: **Guindy National Park**. The city is also home to the **Pallikaranai Wetland**, a critical ecological zone, and the Arignar Anna Zoological Park (Vandalur Zoo) in the southern suburbs. * **Sustainability**: Chennai has strict mandatory rainwater harvesting laws. There is a growing movement toward eliminating single-use plastics, heavily promoted by the Greater Chennai Corporation.
