Air Pollution in Alberta

Here is a pollution map of Canada from 2009
According to the EPA, methane leakage from oil & gas wells makes up more than one quarter of the total methane emissions to the atmosphere. There are more than 300,000 oil & gas wells in Alberta with some 60,000+ coal bed methane wells planned for the future. Methane is 23 times more powerful than carbon dioxide as a greenhouse gas.

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The air pollutant emissions data was compiled in collaboration with provincial, territorial and regional environmental agencies using the latest emission estimation methodologies and statistics available, and data reported by facilities to the National Pollutant Release Inventory. It represents the most comprehensive information on emissions of key air pollutants available in Canada. ~ Environment Canada

Here is a pollution map of North America from 2005

This map shows the locations of almost 35,000 industrial facilities in North America that reported on releases or transfers of pollutants in 2005. ~ Commission for Environmental Cooperation