Environment

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…

In 2015, when her infant daughter began wheezing, Subashini R purchased a machine she had only ever seen in hospitals. Daily trips from Kattukuppam in north Chennai to Tondiarpet Hospital were expensive, costing at least ₹500 then. Although the nebuliser cost four times her daily healthcare expenses, it reduced long-term costs in a region struggling with the lasting effects of pollution. “Every doctor tells locals to leave the region due to the chemicals here,” says the activist, part of the Save Ennore Creek Campaign. A decade later, nearly every household in Ennore has a nebuliser. Her younger daughter now suffers…

The Cooum River, once a sacred river that shaped the history of Madras, has now become a sad sign of urban degradation. For the millions of residents in Chennai, it has transformed into a malodorous, polluted, and stagnant channel, burdened with solid waste accumulation and extensive encroachments along its banks. During a recent datajam organised by Oorvani Foundation and OpenCity, we used Geographical Information System (GIS) datasets and population analytics to investigate the underlying causes contributing to this crisis. The results show that rapid urbanisation, inadequate provision of essential civic infrastructure, and the absence of coherent policy frameworks, along with…

The Pallikaranai Marshland, one of Chennai’s last remaining natural wetlands, has long been a site of ecological tension. Its designation as a Ramsar site brought national and international recognition, along with renewed expectations for strong conservation measures. Yet the marshland continues to face intense pressure from urban development, infrastructure projects and real estate expansion.  Recently, Arappor Iyakkam, an anti-corruption organisation, alleged that state agencies illegally cleared environmental and construction approvals for a large high-value housing project within the Ramsar boundary. As the matter unfolds, it reveals how regulatory gaps and political inaction make the marsh vulnerable. Meanwhile, residents of Tansi…

The Brihanmumbai Municipal Corporation has released the draft Zonal Master Plan for the eco-sensitive zone of Sanjay Gandhi National Park (SGNP). The civic body is inviting suggestions and objections till October 17. However, environmentalists have raised concerns about potential ecological damage in the name of development, through the master plan. They allege that commercial activities are planned very close to sensitive ecosystems. Meanwhile, communities living in and around the park fear displacement, loss of livelihood and erosion of their cultural identity. They are also finding it difficult to submit their feedback, as the draft plan is in English. Background SGNP…

The Pune Riverfront Development Project, which aims to beautify the banks of the Mula-Mutha River through concretisation, has been one of the most debated topics in the city. Many citizens have raised concerns about its environmental impact. While the project promises promenades, gardens, and flood control measures, several people believe it comes at the cost of destroying the natural ecosystem that has existed for centuries. Among them is Swapnil Thakur, a Pune-based musician popularly known as the 'One-Man Symphony,' who is using his music to protest against the project. Once a corporate employee, Swapnil’s life took a drastic turn after…

The Karnataka government has introduced fresh amendments to the Karnataka Tank Conservation and Development Authority (KTCDA) Act, which could reduce buffer zones around lakes and drains to as little as 0–30 metres. On paper, this may appear to be an administrative change. In reality, it risks accelerating floods, pollution, and water insecurity across Bengaluru. Here’s what citizens need to know. How we got here Bengaluru’s lakes have long been central to the city’s ecology and culture. Recognising their importance, courts and planners have repeatedly mandated protective buffer zones: 2012: Karnataka High Court directed a 30-metre buffer around lakes and a…

On September 1st, the Urban Development Department of the Karnataka government issued draft regulations reducing court-mandated drain buffers for Bengaluru, inviting public comments. We responded with an open letter placing on record our analytical review and evidence-based objections.  Reducing buffers around drains (and lakes) will intensify floods, accelerate water loss, and foster encroachments already flagged by the Comptroller and Auditor General of India's (CAG) audits. It also violates the Karnataka High Court and National Green Tribunal orders, undermines Bengaluru’s Climate Action Plan, and breaches public trust. We urge the government to halt these reductions and act on the CAG's recommendations.…

A walk around Madipakkam Lake today offers a lush, green escape: a scenic pathway encircling brimming waters, shaded by native trees and plants that purify the air. Small islands in the lake attract a variety of birds, making it a haven for urban biodiversity. Along the paved paths, vendors selling healthy snacks and fresh vegetables have set up shop, a reflection of how environmental restoration can also support local livelihoods, particularly for low-income groups. From as early as 4 am until late in the evening, hundreds of people, both young and old, visit the lake daily. Whether it is for…