Combustion and venting processes in our Western Canada Gas operations are a source of air pollutant emissions. These emissions include sulphur dioxide, oxides of nitrogen, volatile organic compounds and particulate matter.
Reducing these emissions sometimes involves tradeoffs between different types of emissions, as some efforts to decrease air pollutant emissions can cause an increase in greenhouse gas emissions. For example, optimizing the efficiency of compressor engines to reduce emissions of oxides of nitrogen requires an increase in natural gas use, which can increase greenhouse gas emissions. We are working to identify optimal trade-offs in these areas. Some of the energy efficiency projects that that we implemented as part of our GHG management strategy are also expected to reduce air pollutants. These projects are listed in the GHG section.