Environment

Two years ago, I visited the Central Park South apartment complex in Old Mahabalipuram Road (OMR) to observe and write about its in-house Sewage Treatment Plant (STP). While large apartment complexes are required to have the facility to treat their sewage, many in Chennai lack one. Unlike other buildings in OMR, Central Park South had little choice, as the Chennai Metropolitan Water Supply and Sewerage Board (CMWSSB) has yet to provide essential services like drinking water and underground drainage. I revisited the apartment this month, eager to see how the sewage treatment system had evolved. While it has had a…

Urban Heat Islands (UHI) are areas within cities that experience significantly higher temperatures than their rural counterparts due to human activities, concretisation, and lack of vegetation. Bengaluru, the fifth most populous metropolis (Census of India, 2011) and one of the rapidly growing cities in India, is no exception. In the last two decades, the city has seen a rapid rise in built-up area from 37.4% to 93.3%. The pressure of urbanisation has not only affected the natural and ecological resources but is also impacting the city’s livability because of rising temperature levels. Unlike sudden disaster events like landslides or floods,…

Ambedkar Nagar, located in Kodathi panchayat, is a rapidly expanding neighbourhood in Bengaluru's outskirts. Young professionals socialising, walking to their workplace, waiting for their cabs—this area reflects Bengaluru's bustling IT ecosystem. Water tankers are a common sight, supplying water to local buildings. From small eateries to salons, the area has all the essential facilities for everyday life. The Wipro office premises are located on one side of Ambalipura-Sarjapura Road, while opposite its Kodathi gate, NPS School Road is lined with brightly painted, four-storey Paying Guest (PG) accommodations. But this growth has come at a steep cost, especially for the environment.…

Catching a glimpse of the Indian Eagle Owl is not a rarity for birders and nature enthusiasts who frequent the Nanmangalam Lake and the surrounding forests. Yet, this privilege is under threat as the lake's once-thriving ecosystem faces severe environmental degradation. Fed by rainwater from the hillocks of the Nanmangalam Reserve Forest, the lake — spread over 200 acres — is now ravaged by encroachments, illegal water extraction, sewage and garbage disposal. Chennai has two significant reserve forests: the Pallikaranai Wetland and the Nanmangalam Scrub Forest. Located along the Tambaram-Velachery Main Road, Nanmangalam Forest is one of the last remaining…

The blanket of haze that shrouds most big cities in India has grown denser as air quality continues to dip. Last winter was no different with pollution levels soaring way above permissible limits and posing major risks to public health.      A recent analysis of winter pollution during 2024-25 by the Centre for Science and Environment (CSE) highlights alarming pollution trends in India's megacities, with Delhi leading with the worst air quality. Even megacities outside the Indo-Gangetic Plains (IGP) have seen escalating air quality challenges, despite relatively favourable climatic conditions.  One significant trend across cities like Kolkata, Mumbai, Hyderabad, Chennai,…

What started as a cool activity in the 1970s—a group of college students going on night walks to protect freshly laid turtle eggs—has, half a century later, evolved into a crucial conservation movement. The Students' Sea Turtle Conservation Network (SSTCN) now plays a key role in the conservation of the Olive Ridley turtles along the Chennai coast. Their awareness efforts have been so impactful that these night walks are flooded with people of all ages, particularly children and young adults. From collecting freshly laid eggs and relocating them to hatcheries to releasing hatchlings back into the sea after 45 days, SSTCN volunteers…

பெருநகர சென்னை மாநகராட்சி, ஒருங்கிணைந்த திடக்கழிவு மேலாண்மை திட்டத்தின் (Integrated Solid Waste Processing Facility (IWPF)) கீழ், 2100 மெட்ரிக் டன் கழிவுகளை எரித்து மின்சாரம் உற்பத்தி செய்யும் எரிவுலையை கொடுங்கையூரில் நிறுவ திட்டமிட்டுள்ளது. இந்த  திட்டத்தின் தளம் - 01 குப்பை எரிவுலை (Waste-to-Energy Facility) திட்டமிடப்பட்டுள்ள இடம், ஈரநிலமாக அறியப்படும் சர்க்கார் நஞ்சை பகுதியில் அமைந்துள்ளது, இது வெள்ள பாதிப்புக்குட்பட்ட ஒரு பகுதியாகும். அதே நேரத்தில், இந்த இடம் ஏல ஆவணங்களில் (Tender Documents) குறைந்த வெள்ள பாதிப்புள்ள பகுதியில் உள்ளதாக தவறாக சித்தரிக்கப்பட்டுள்ளது.  இதனால் இப்பகுதியில் சுற்றுச்சூழல் பாதிப்பு ஏற்பட்டு மழைக்காலங்களில் அதிக வெள்ளம் ஏற்படும் வாய்ப்பை உருவாக்கும்.  இயற்கையான ஈரநிலங்களின் முக்கியத்துவம் பெருநகர சென்னை மாநகராட்சி - ஒருங்கிணைந்த திடக்கழிவு மேலாண்மை திட்டம் மூலம் மண்டலம் 1 முதல் 8 வரை உற்பத்தியாகும் திடக்கழிவுகள் மற்றும் மண்டலம் 9 முதல் 15 வரை பிரிக்கப்பட்ட…

Chennai witnessed an unprecedented environmental disaster this year, as more than 1,000 dead Olive Ridley turtles washed ashore in January. The mass mortality event has put the Forest and Fisheries Departments, along with voluntary organisations, on high alert, prompting collaborative efforts to strengthen Olive Ridley turtle conservation. The Tamil Nadu Marine Fishing Regulation Act, 2020, which mandates mechanised trawlers to fish at least five kilometres from the shore, was enforced more strictly from late January. Fishermen were educated on the dangers of ghost nets and urged to use Turtle Excluder Devices (TEDs) to prevent accidental turtle entanglement. Read more: Oil…

Lakshmipathi, a small-scale dairy farmer, has lived in Madambakkam for over 25 years. "Madambakkam’s name originates from cows, but the common grazing grounds around the lake have disappeared over time. Now, if we let the cattle roam the streets, corporation officials will impound them. It costs us ₹2,600 every time we retrieve them," he says. A government cattle grazing poromboke land converted into the urban forest near Madambakkam Lake. Pic: Shobana Radhakrishnan Cattle rearing is a vital livelihood for many in Madambakkam. "The area is home to around 3,000 cattle. The Madambakkam Lake and its surrounding land have historically served…

“I have always been fascinated by trees. This long journey of documenting Bengaluru’s trees was addictive. The more I documented them, the more I wanted to do it,” remarked K Sankara Rao, author of Trees of Bangalore. Rao, a former professor at the Department of Biochemistry, Indian Institute of Sciences (IISc.), has a long and varied experience in the field of Plant Biology with profound reverence and love for nature. Published in two volumes, Trees of Bangalore is a one-time documentation depicting the rich ecology of Bengaluru and works as a road map for policymakers to preserve this richness. Read…