Sarnia Lambton residents are breathing a little easier.
There were no smog days locally in 2013 and the Environment Ministry says air quality was rated good to very good 93 per cent of the time in 2013.
Spokesperson Kate Jordan says there was a 38 per cent drop in nitrogen dioxide and a 60 per cent decrease in sulfur dioxide.
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In fact in 2013, there were no smog advisories issued in all of the province, although it was a much cooler summer than normal.
