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Online catalogue: Canadian Environmental Sustainability Indicators: Socio-economic Information Related products PDF version Online catalogue Main page Executive summary Introduction Findings Conclusion Figures and maps Methods and data quality List of acronyms References More information

Methods and data quality

Description of the air quality indicator

The air quality indicators are designed to track the longer term trend in human exposure to ozone and PM2.5 levels from both a national and regional perspective.

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Description of the greenhouse gas emissions indicator

The greenhouse gas emissions indicator, related data and trends information come directly from Canada’s National Inventory Report, 1990–2004, an annual report submitted by Environment Canada as required under the United Nations Framework Convention on Climate Change (UNFCCC) (Environment Canada 2006a). Greenhouse gas emissions are estimated according to the procedures and guidelines prescribed by the Intergovernmental Panel on Climate Change (IPCC) and are reviewed annually by a United Nations Expert Review Team. The indicator estimates Canada’s total annual anthropogenic (human-induced) emissions into the atmosphere of six main greenhouse gases:

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Description of the freshwater quality indicator

The national freshwater quality indicator is based on the Water Quality Index (WQI), which is endorsed by the Canadian Council of Ministers of the Environment (CCME 2001). The WQI is described further on the CCME’s website (

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