<span style="color: #222222;">Delhi Chief Minister Arvind Kejriwal today launched a campaign Red light on, Gaadi off to tackle air pollution in the national capital.<br />''<br />'' Briefing reporters, Mr Kejriwal said that there are one crore vehicles registered in the city. He urged people to switch off their vehicles, while waiting on a traffic signal. <br />''<br />''He said, on an average a car spends about 15 to 20 minutes at red light every day and consumes about 200 ml of oil. Mr Kejriwal said, if a person starts switching off his vehicle at red light, he can save seven thousand rupees in a year.</span><br />