Sentence Examples


  • Smog was cited as a major factor that contributes to global warming.
  • In a city, this has the added benefit of providing cleaner air and reducing the air pollution and smog that is a problem in many large cities.
  • Vitamin D deficiency is also slightly more common in inner city areas, because environmental factors, such as smog, can block the necessary ultraviolet (UV) component of sunlight.
  • However, sunlight is not always the most effective source for the vitamin, depending on geographic latitude, seasonal changes, cloud cover, smog and sunscreen.
  • Most people who live in or near a large city are familiar with the look of smog that appears as a thick, gray blanket of air pollution that covers the city.