Fog and smog may look similar at first glance, but they are very different in origin, composition, and impact on health. While fog is a natural weather phenomenon, smog is a harmful, human-made ...

Originally, the word "smog" meant the combining of smoke and fog. Today, however, the word refers to the type of smog that forms in large cities, such as Los Angeles. Because this type of smog forms ...

New Delhi: A video of dense haze engulfing Noida’s high-rise buildings has gone viral, fuelling an online debate over whether the near-zero visibility was caused by winter fog or toxic smog. The ...