India, Jan. 17 -- A filter-less ionization system that cleans the air, pole-mounted dust traps that operate on solar energy, an electrostatic mist sprayer, and a high sulphur-compatible retrofit emission control device for industries - these were some of the innovations grabbing eyeballs on Friday at the Indian Institute of Technology (IIT) Delhi, which showcased 33 shortlisted proposals under the Delhi government's "innovation challenge" to find solutions to Delhi's persisting problem of air pollution.

Chief minister Rekha Gupta on Friday inaugurated the Delhi Pollution Control Committee (DPCC)'s exhibition titled Innovative Technological Solutions for Combating Air Pollution. Addressing young innovators, Gupta said, "Seeing all these i...