CHENNAI – The Tamil Nadu government’s Green School Scheme can offset 91 percent of electricity consumption for all state government educational and hospital institutions if scaled across the state. This finding emerged from an official impact study released Monday in Chennai.
The study projects this outcome if the scheme extends to all 45,000 government schools. Finance and Environment Minister Thangam Thennarasu and School Education Minister Anbil Mahesh Poyyamozhi jointly launched Climate Education and Cool Roof initiatives for 300 Green Schools on Monday.
Energy Savings and Financial Impact
The impact study, prepared with the Indian Institute for Human Settlements (IIHS), examined current results. Rooftop solar installations in pilot Green Schools have reduced grid electricity consumption by 46 percent per school. Each green school saves an average of 3,572 kWh annually. This translates to fiscal savings of Rs 26,000 per school per year.
Scaling these energy savings to all 45,000 government schools in Tamil Nadu would achieve significant statewide reduction. The annual reduction in electricity use would equal 91 percent of the current total annual consumption for all government and aided educational institutions and hospitals in the state.
The study also indicated that these aggregate monetary savings could offset a substantial share of the capital investment needed for solar installations and associated infrastructure over time.
Addressing Thermal Comfort and Learning
The Green School Scheme prioritizes student health. It addresses extreme heat, which Tamil Nadu formally recognizes as a state-specific disaster. Classrooms with concrete roofs often reach temperatures between 38°C and 40°C .
Such high temperatures cause a cognitive drop. Research indicates exam pass rates can fall by 10 percent when classroom temperatures exceed 32°C. The Cool Roof initiative targets this issue. Piloted in Ambattur, it uses high-reflective coatings. These coatings reduce indoor temperatures by 3–4°C and ceiling surface temperatures by 4–5°C .
A government publication stated that thermal comfort plays a critical role in supporting students’ attention and learning outcomes.
Holistic Climate Action Initiatives
The scheme proposes holistic climate actions beyond energy and cooling. These include smart water management and waste management:
- Water Management: The scheme integrates rainwater harvesting structures. These are now installed in 79 percent of evaluated schools. Drip irrigation systems are also implemented in 57 percent of schools.
- Waste Management: Efforts include source segregation of waste. Vermicomposting processes organic waste. This waste converts into manure for school gardens.
Climate literacy is a core component. 4,000 teachers have been trained across all 38 districts . These volunteer “Climate Ambassadors” lead student nature camps and environmental audits. They educate students on environmental responsibility.
National Recognition and Future Expansion
The United Nations Environment Programme (UNEP) supports the initiative. This support comes under the BeCool Project, funded by the Swiss Agency for Development and Cooperation (SDC).
Balakrishna Pisupati, UNEP Country Head, described Tamil Nadu’s effort as a national benchmark. This benchmark applies to sustainable educational spaces across India.
The Tamil Nadu government plans continued phased integration of these measures. The latest phase targets 100 schools for passive cooling retrofits. These retrofits include shading solutions, natural ventilation improvements, and increased green cover, according to a government press release.