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Air

Clean Air Online provides timely, locally relevant and action-oriented information, tools and resources focused on clean air and air quality issues.

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Air

Air is a common term for the atmosphere: the layer of nitrogen, oxygen and other trace gases that surround our planet and make life on Earth possible.

The atmosphere is a complex natural system. Air pollution from transportation, industries, and other sources causes an imbalance in this system by modifying its chemical composition. Living things are affected by air pollution in a variety of negative ways.

This section contains information on Environment Canada's efforts to reduce air pollution and better understand its levels, causes and sources.

  • 1Clean Air

    This section provides information on air pollution and other important environmental challenges, such as climate change and stratospheric ozone depletion.

  • 2Montreal Protocol: 19th Meeting of the Parties

    Twenty years ago in Montreal, Canada joined 23 other countries to sign the Montreal Protocol on Substances that Deplete the Ozone Layer. In September 2007, the world will once again convene, this time to celebrate the anniversary of the Protocol's signing. Canada is proud to host this historic meeting for the 20th anniversary in the city where this milestone agreement was born.

Date Modified: 2008-12-11

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