State officials in Indiana and Illinois are warning of high ozone levels today that could cause health problems for children, the elderly and those with respiratory difficulties.
The Indiana Department of Environmental Management and the Illinois Environmental Protection Agency issued Air Quality Action Days for ozone in Lake, Porter and LaPorte counties in Indiana and Cook County in Illinois today. The warning comes on the heels of the same alert being issued for the region Tuesday.
Ozone is created on hot, still days when pollutants in gasoline, automobile emissions and other combustion engines, such as those that burn coal and other fossil fuels, are cooked by the sun.
Environmental and health agencies issue alerts when ozone levels are expected to be high and urge people to reduce vehicle trips, mow lawns early in the morning or later in the evening and reduce energy use in businesses and homes.