Why is it in the news?
Delhi government testing pollution-reducing coating technology.
Aims to reduce urban air pollution levels.
Category: Environment
Important Points:
● Uses titanium dioxide (TiO₂) as photocatalyst
● Activated by sunlight to break down pollutants
● Targets NO₂ and volatile organic compounds
● Applied on roads, buildings and pavements
● Helps reduce formation of secondary pollutants
● Does not directly remove PM2.5 particles
● Works as passive and continuous pollution control system
● May cause nitrate runoff leading to eutrophication
● Complements other measures like GRAP