The Lane Regional Air Protection Agency issued a smog advisory for Saturday, Aug. 23, in Eugene and Springfield.
A heat wave is expected to worsen ground-level pollution as heat, sun and wind combine. When emissions such as vehicle exhaust react with sun and heat, they form smog and haze.
That produces harmful ground-level ozone, unlike the ozone naturally found in the upper atmosphere. Depending on exposure, it can cause coughing and sore throats and aggravate asthma…