The Canadian Ambient Air Quality Standards are being gradually replaced by National Ambient Air Quality Objectives.
Canada is moving away from non-binding guidelines (NAAQOs)to Canada wide standards (CAAQSs)for air quality.

Question

Quizplus · Accepted Answer

Canada is moving from the National Ambient Air Quality Objectives (NAAQOs), which were non-binding guidelines, to the more stringent and binding Canadian Ambient Air Quality Standards (CAAQSs) to improve air quality across the country.

The Canadian Ambient Air Quality Standards Are Being Gradually Replaced