“This is about protecting Delhi’s people with solutions that work on the ground. We are putting simple, safe, science-based tools on the ground and measuring results openly so families feel the difference in the air they breathe and in their lives,” Sirsa said.

“If the study confirms that these “smog‑eating” surfaces are effective and cost‑efficient, the (Environment) department will move a Cabinet proposal for rapid, citywide deployment at priority locations such as busy corridors, markets and public spaces to deliver visible, people‑first gains in air quality,” Sirsa added. The study will also examine cost-effectiveness, safety and long-term sustainability, while identifying credible suppliers to enable a faster scale-up.

Experts have noted that using titanium dioxide as a coating has its advantages for being low-cost and chemically stable. It is also known for its compatibility with traditional construction materials. It has been “demonstrated that TiO₂-based photocatalytically active construction materials can be useful for gaseous depollution and environmental cleaning processes”, a research in the journal Nanomaterials notes.

The minister also referred to ‘Innovators’ Challenge’, launched by the department that invites ideas from students, startups and experts for rapid pilots.

“Delhi will evaluate and adopt the best of proven photocatalytic technologies, prioritising safety, sustainability and measurable impact to deliver cleaner air faster,” Sirsa said. The government said the initiative is part of its “24×7, 365‑day strategic environmental action plan to strengthen the city’s protective shield against air pollution through technology‑driven interventions and rigorous scientific validation”.