The Indiana Department of Environmental Management is warning of high ozone levels today that can cause health problems for those with pre-existing respiratory problems, children and the elderly.
The agency issued an Air Quality Action Day for ozone for Lake, Porter and LaPorte counties for Monday.
Ozone is created on hot, still days when pollutants in gasoline, automobile emissions and other combustion engines like the burning of 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, fuel vehicles and mow lawns early in the morning and later at night and reduce energy use in businesses and homes.
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