There is strong evidence for causality between short-term SO2 exposures and respiratory morbidity, based on controlled human exposure studies looked at by Health Canada.
Sulphur Dioxide and Health
Summary of recent findings from Health Canada

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Oil & Gas
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Canada's Methane Opportunity: Innovation, Exports, Jobs
Canada's methane mitigation industry is thriving, with well-paying jobs and investment likely to grow if strong methane regulations are in placePrograms
Leading the transition to clean energy requires advancing solutions to today’s energy challenges from various angles.
The Pembina Institute has spent four decades working to reduce the environmental impacts of Canada’s energy production and to provide actionable ideas on how to implement clean energy.