Poor Air Quality Alert SaturdayJuly 14th, 2012 at 12:04 am by Tony Petrarca under Tony's Pinpoint Weather Blog
So what exactly determines poor air quality. The Rhode Island DEM has issued an alert for our area on Saturday..Ground-level ozone is created through the interactions of man-made (and natural) emissions of volatile organic compounds and nitrogen oxides in the presence of heat and sunlight. Cars and gasoline-burning engines are large sources of volatile organic compounds (VOCs). VOCs also come from consumer products such as paints, insecticides, and cleaners as well as industrial solvents and chemical manufacturing. Nitrogen oxides (NOx), the other chemical precursor of ozone, are produced whenever fossil fuels are burned and are primarily produced by motor vehicles and power plants. The sun’s direct ultraviolet rays convert these emissions into ground-level ozone, which is unhealthy to breathe.
Many factors impact ground-level ozone development, including temperature, wind speed and direction, time of day, and driving patterns. Due to its dependence on weather conditions, ozone is typically a summertime pollutant and a chief component of summertime smog….Tony Petrarca