India unveils anti-smog cannon in fight against Delhi pollution

The cannon blasts water droplets at high speed to flush out air pollutants, but environmentalists say it doesn't tackle the root cause of the problem

India has unveiled a new weapon against air pollution - an "anti-smog gun" which authorities hope will clear the skies above New Delhi but which environmentalists say amounts to a band-aid solution.

The cannon's Indian manufacturers say the fine droplets of water it ejects at high speed can flush out deadly airborne pollutants in one of the world's smoggiest capitals.