Will ‘smog-eating' streets be Delhi's new weapon against air pollution? Govt launches study

Delhi to test smog-eating coatings on roads and public spaces. (Image credit: X/@IndianInfoGuid)

The Delhi government has announced a major feasibility study into deploying special ‘smog-eating’ coatings across the city’s infrastructure. The initiative aims to reduce dangerous air pollutants through a scientific, technology-driven approach.

Environment Minister Manjinder Singh Sirsa stated the government will examine photocatalytic surfaces containing titanium oxide. These coatings are applied to roads, pavements and public spaces.

A time-bound scientific evaluation



As reported by The Indian Express, the Environment Department has been directed to sign a memorandum of understanding (MoU) with a reputed scientific institution within 30 days. This kicks off a six-month period of field trials and evaluation.

The department will provide monthly progress updates. A final report detailing the findings is due within six months of the MoU being signed.

The study will rigorously assess the technology’s effectiveness in breaking down pollutants like nitrogen dioxide and harmful hydrocarbons. It will also scrutinise cost-effectiveness, safety and long-term sustainability.

A path to citywide deployment



Minister Sirsa framed the study as a practical step towards tangible results for Delhi’s residents. “We are putting simple, safe, science-based tools on the ground and measuring results openly,” he was cited by The Indian Express.

He confirmed that a positive outcome would lead to rapid action. “If the study confirms that these ‘smog‑eating’ surfaces are effective and cost‑efficient, the department will move a Cabinet proposal for rapid, citywide deployment,” Sirsa said.

Priority locations for the coatings would include busy traffic corridors, markets and other major public spaces.

The science behind the solution



The technology under review involves titanium dioxide, a substance noted by experts for being low-cost and chemically stable. Its compatibility with traditional construction materials like concrete makes it a viable candidate for large-scale urban use.

According to a report in the journal Nanomaterials, cited by The Indian Express, research has demonstrated that titanium oxide-based photocatalytic materials can be useful for “gaseous depollution and environmental cleaning processes”.

Part of a broader strategy



This initiative is not occurring in isolation. The government described it as a component of its round-the-year strategic environmental action plan.

The plan focuses on strengthening the city’s “protective shield against air pollution through technology‑driven interventions and rigorous scientific validation”.

In a related move, the Environment Department has also launched an ‘Innovators’ Challenge’. This programme invites ideas from students, startups and experts for rapid pilots on other new technologies.

“Delhi will evaluate and adopt the best of proven photocatalytic technologies, prioritising safety, sustainability and measurable impact,” Minister Sirsa stated.