06/10/2012 08:57 EDT | Updated 08/10/2012 05:12 EDT

Smog Advisory: Environment Canada Issues Warning For Southern Ontario


TORONTO - A good portion of southern Ontario is under a smog advisory.

People with asthma or lung issues may find it harder to breath today.

Environment Canada says what has led to the smog is a low pressure wind system that transports pollutants from the United States.

That combines with local sources in southern Ontario which makes for a day of elevated air pollution.

Air quality should be back to normal by Tuesday.