Environment

Commuters passing through Ambattur Industrial Estate inevitably find a layer of dust coating their vehicles, faces, and hands. For Lalitha*, a domestic worker employed at a high-rise apartment near Padi flyover’s Saravana Stores, the last two weeks of December have been especially unbearable. "Dust, dust, dust everywhere," she says, coughing through a persistent cold. At 6 pm, when the rush hour begins, it takes her nearly 30 minutes by bus to cover the 5 km journey home. The ride to the Dunlop area is punctuated by pollution, blaring horns, and endless traffic snarls. “It should take 15 minutes usually, but…

செங்கல்பட்டு மாவட்டம், திருப்போரூர் மற்றும் திருக்கழுக்குன்றம் வட்டங்களுக்குட்பட்ட வருவாய் கிராமங்களில், இயற்கையாக அமைந்துள்ள கழுவேலி, உப்பங்கழி நீர்நிலையில், புதிய குடிநீர் நீர்த்தேக்கம் அமைக்க CRZ அனுமதி வழங்கியுள்ளது மாநில கடற்கரை ஒழுங்குமுறை மண்டல ஆணையம். இத்திட்டத்தின் முதல் கட்டத்தில் நெம்மேலி, கிருஷ்ணகாரனை, தண்டலம், பட்டிபுலம், திருப்போரூர், மாமல்லபுரம், சலுவான்குப்பம், பையனூர் ஆகிய வருவாய் கிராமங்களுக்குட்பட்ட 4375 ஏக்கர் பரப்பளவில் வருவாய்த்துறை, நீர்வளத்துறைக்குச் சொந்தமான இடங்களில் நீர்த்தேக்கம் அமைக்கத் திட்டமிடப்பட்டுள்ளது. 1.655TMC கொள்ளளவு கொண்ட இந்நீர்த்தேக்கம் மேற்கூறிய கிராமங்களைச் சேர்ந்த 50 ஆயிரத்துக்கும் மேற்பட்ட மக்களின் குடிநீர்த் தேவையைப் பூர்த்தி செய்யும் எனவும் அருகாமை கிராமங்களின் வெள்ள பாதிப்பைக் குறைக்கும் எனவும் அரசுத் தரப்பில் கூறப்படுகிறது. Map showing components of the Kovalam reservoir. Pic courtesy: Tamil Nadu Water Resources Department. இத்திட்டத்திற்கான விண்ணப்பத்தை 17.11.2025 அன்று  தொழில் நுட்ப  வல்லுநர் குழு பரிசீலித்தது. 20.11.2025 அன்று  மாநில கடற்கரை  மண்டல ஆணையம் விண்ணப்பத்தைை பரிசீலித்து CRZ அனுமதிக்கு பரிந்துரைக்கிறது.…

As sweater weather arrives, winter brings purple December flowers, fresh Ooty carrots with slivers of roots, and crisp Kashmiri apples to Chennai’s Koyambedu Wholesale Market Complex (KWMC). Much before dawn, workers unload crates of seasonal produce, and retailers vie for the best prices at Asia’s biggest market place for perishable goods. For the last 15 years, Murugan*, a parking personnel at the flower market's gate, has witnessed the coming and going of seasons, flowers, customers, and trucks. Most of all, he has seen the cityscape change with the addition of flyovers, bridges, cars, and metro construction. This December, a combination…

The Cantonment Railway Colony was declared Bengaluru’s second Biodiversity Heritage Site in September 2025—a rare victory for citizens who had protested against large-scale tree felling for a proposed commercial development. Over 15,000 citizens stood tall against the tree felling, and following months of protests, the government declared the site a Biodiversity Heritage Site. However, just three months later, on December 6, the state government withdrew the notification. The reversal has once again put nearly 370 heritage trees in the colony at risk. A threat for citizen participation The colony houses around 370 mature and heritage trees belonging to around 50…

If Mumbaikars can gather for festivals, political rallies and celebrations, can they not rally for the right to breathe? That question and a sense of growing frustration and urgency were what led to the formation of the Human Chain for Clean Air — a citizen-driven movement demanding urgent government intervention. For weeks, the AQI in Mumbai has crossed hazardous levels, affecting children, senior citizens and working professionals alike. Each of us has been noticing that people around us are constantly coughing, children are falling sick frequently, and senior citizens are struggling to walk without breathlessness. I realised that instead of…

Chennai’s unregulated urbanisation has destroyed its water bodies and disrupted its natural drainage systems. This is true for the Kodungaiyur Canal System in North Chennai which includes the Ambattur, Korattur and Retteri lakes. This crucial waterway is designed to drain floodwaters into the Ennore Creek but is marred by encroachments and illegal sewage discharge. In fact, Kodungaiyur Lake, a part of Kosasthalaiyar and Cooum basin, is one of the lakes that has been eaten up and has been reduced to narrow canals because of human activity and government negligence. Flooding in encroached area, vulnerable groups affected During a datajam organised…

Saul Kere, a lake off Sarjapur Road, was once a thriving habitat for birds. “When I started birding regularly in  2019, I had observed nearly 180 species of birds here,” Bijoy Venugopal, a birder and environmentalist, recalls. “Even during our latest bird walk on December 7th, we recorded 67 species of birds, more than what you would see at some bird sanctuaries.” However, the number of birds has declined, mainly due to effluent inflow. E-bird, a public data forum, has a record of 213 bird species in Saul Kere. That is the richness of the biodiversity of the Saul Kere…

Walk through any city, and you'll encounter Nature-based solutions (NbS) everywhere: urban parks providing respite from hot streets, wetlands filtering stormwater, and trees along busy roads reducing air pollution, among others. This green infrastructure, however, is often viewed through a narrow lens—as mere providers of shade, picturesque spaces, or recreational spots.  This limited perspective has harmful consequences. When development pressures mount or budgets tighten, these natural assets become expendable and are often removed without proper analysis of their multidimensional benefits. This is where quantifying the benefits of NbS becomes essential. By measuring and monetising the value these solutions provide, we…

When the northeast monsoon hits Chennai, a foreseeable result of the heavy downpour is severe flooding in several areas, including Porur Lake. As residents living near this 200-acre water body battle inundation every year, our team set out to investigate the root causes of flooding using available data. Environmental issues have often been dealt with a one-size-fits-all approach, but our study aimed to provide specific solutions tailored to the Porur catchment area. For this, we mapped inundation patterns, land gradient, land use change and the outlay of stormwater drains (SWDs).   At a recent datajam organised by the Oorvani Foundation…

Mumbai’s L Ward, covering Kurla, Chandivali, Saki Naka, and Powai, has been quietly heating up, and not just metaphorically. It is a ward of extremes: dense slums on one side, luxury high-rises and malls on the other. But when the mercury rises, the contrasts fade, and everyone feels the burn. With urban heat on the rise across the city, L Ward is emerging as one of Mumbai’s hotspots where everyday life is increasingly being shaped by climate stress. The heat problem Spread across 15.6 sq km, L Ward is home to more than nine lakh people, packed into one of…