Even though, many steps have been taken to curb air pollution, which is an health hazard, noise pollution is equally taking a toll in metro cities with vehicles especially car drivers honking unnecessarily at red lights creating pressure on others on roads.
Read more at http://www.thestatesman.com/news/delhi/noise-pollution-takes-toll-in-metro-cities/148030.html#fjaSTZzoglLM1qMu.99