Nigeria's largest city Lagos declared a car "Horn-Free Day" last week  about for from in of with    an attempt to raise awareness  about for from in of with    noise pollution. People are constantly bombarded  about for from in of with    an endless cacophony  about for from in of with    screeches, sirens and high-pitched honking  about for from in of with    impatient motorists. The Lagos State Governor Babatunde Fashola told reporters that the extent  about for from in of with    the noise  about for from in of with    car horns was now serious enough to be a danger to people's hearing. Talking  about for from in of with    Horn-Free Day, he told reporters: "It is  about for from in of with    our own good. It is for our own health. It is for our own life." The World Health Organization said high-decibel noise pollution was a critical health hazard that increases the risk  about for from in of with    cardiovascular diseases and high blood pressure. Governor Fashola hoped his city's roads would be a little quieter. He contrasted the constant honking  about for from in of with    Lagos to the relative quiet  about for from in of with    European roads. He said he recently spent ten days  about for from in of with    Europe and, "did not hear the sound  about for from in of with    a horn while driving". He asked: "Can you imagine that we can drive  about for from in of with    Lagos without horns?" However, a Lagos blogger defended the use  about for from in of with    the horn as part  about for from in of with    the city's culture. He said: "Honking is a beautiful trend  about for from in of with    this part of the world, and it is a trend that every class of people  about for from in of with    the country embraces." Apart  about for from in of with    making other drivers aware of danger, he said people honk to greet friends and celebrate weddings and other happy occasions.