Urban smog is the outcome of ______. |
water pollution air pollution ozone depletion global warming |
air pollution |
The correct answer is Option (2) → air pollution Smoky fog over cities called as urban smog is caused by atmospheric pollution. It proves very harmful to human health. Air pollution can also cause acid rains. Rainwater analysis of urban environment has indicated that pH value of the first rain after summer is always lower than the subsequent rains. |