Monitoring and inventory programs are key ways in which Environment Canada, along with provincial and territorial partners, gathers data about the quality of our air and sources of pollution.

Pollution issues presented here include smog, acid rain, indoor air pollution, land use and transboundary movement of air pollutants.

The emissions of various air pollutants that affect human health and contribute to air pollution problems such as smog, acid rain, and visibility are tracked by Environment Canada.

This section contains links to information about ozone balloon research and ozone mapping in Canada.

Learn all about stratospheric ozone: find information on the history of stratospheric ozone layer depletion, the science of ozone depletion, Canada's Ozone Layer Protection Program and the regulatory approach to protecting the ozone layer.

Find information here on actions being taken by Environment Canada to address volatile organic compound emissions resulting from the use of consumer and commercial products in Canada.