## Environment
West Bengal has exceptionally varied environments, from the **Himalayan foothills and tea-growing hills** in the north to the **Gangetic plains**, industrial river corridors, wetlands, and the **mangrove-rich Sundarbans delta** in the south.
### Major environmental features - **The Sundarbans** — one of the world’s largest mangrove ecosystems and a UNESCO World Heritage Site on the Indian side. - **The Ganges/Hooghly river system** — central to settlement, transport, religion, and industry. - **East Kolkata Wetlands** — internationally recognized wetland system and Ramsar site. - **Northern forests and foothills** — habitat for elephants, rhinoceros in nearby regional landscapes, and rich birdlife.
### Air quality - Air quality can be a concern in **Kolkata**, the industrial belt, and traffic-dense urban areas. - Seasonal variation is significant, with winter inversions and festive emissions sometimes worsening conditions. - Real-time monitoring is available through official and public air-quality platforms in major cities.
### Water and rivers - River systems are central but face pressure from sewage, industrial discharge, siltation, and plastic waste. - Drinking water quality varies by locality and source. - Coastal salinity and storm surges affect vulnerable southern districts.
### Protected areas and biodiversity Important protected areas include: - **Sundarbans National Park** - **Buxa Tiger Reserve** - **Jaldapara National Park** - **Gorumara National Park** - **Singalila National Park** - **Neora Valley National Park** - **Mahananda Wildlife Sanctuary**
### Climate and hazards - Tropical monsoon climate in much of the state; cooler mountain climate in the north. - Key environmental risks: - Cyclones - River erosion - Flooding - Landslides in hill areas - Sea-level rise and salinity intrusion in delta regions
### Sustainability and recycling - Municipal recycling and waste segregation efforts are expanding but uneven. - Wetland conservation, plastic reduction, and river cleanup remain major policy themes. - Community and NGO-led mangrove planting and climate adaptation efforts are important in the Sundarbans region.
### Environmental strengths - Extraordinary ecological diversity in a relatively compact state. - Strong public awareness around wetlands, rivers, forests, and wildlife. - Internationally significant habitats and birding areas.
### Ongoing pressures - Urban expansion around Kolkata. - Industrial pollution in some corridors. - Human-wildlife conflict in forest-edge regions. - Climate vulnerability in the low-lying delta.
### Practical advice - Check AQI if you have respiratory conditions. - Avoid littering in hill stations, wetlands, and forested zones. - Respect wildlife rules in national parks and tiger reserves. - In cyclone season, monitor official forecasts from IMD and state disaster authorities.
