With wildfire smoke affecting most of North America, what are the best ways to minimize the health impacts of air pollution under climate change? Here are answers to some key questions about the ongoing air quality problems.
What is happening with air quality right now?
- Many North Americans have never experienced local air quality as bad as it’s been this week.
- The air quality has been poor across the most densely populated regions in Canada and the United States.
- Based on analysis starting in 2006, the average U.S. population exposure to wildfire smoke is one of the highest estimated, and the highest over the eastern U.S. Air pollution levels, measured by the Air Quality Health Index in Canada, and the Air Quality Index in the U.S., have been considered high risk across much of Canada, and the eastern U.S.
What is causing the poor air quality?
- This creates conditions that foster haze, smog and wildfires.
- They have, during the worst air quality, swept smoke from fires in Québec directly into the most densely populated regions of the continent, contributing to record-breaking pollution in New York.
- Those living nearest to the fires are affected by high levels of harmful particles and gases directly emitted by the fires.
What are the risks to us?
- The current estimated cost of air pollution in Canada is $120 billion per year.
- Health Canada estimates that air pollution is linked to more than 15,000 premature deaths in Canada every year.
- Wildfire smoke, specifically, can cause throat irritation, coughing, headaches and can affect lung function even in healthy children.
What can we do to protect ourselves in the short term?
- People can help protect themselves by paying attention to air quality alerts and follow associated guidance.
- This guidance typically involves reducing exposure by limiting time outdoors when pollution is severe, especially for vigorous physical activity.
- When outside, wearing a well-fitting N95 mask offers protection from smoke particles, but will not filter out harmful gases.
What can we do to protect ourselves in the long term?
- So will further reductions in other sources of air pollution, along with wildfire management strategies.
- Outdoor air pollution unfairly affects racialized and socio-economically disadvantaged communities, which also have lower access to shelter that keeps polluted air out.
Is this a ‘new normal?’
- Those risks are projected to further increase over parts of North America.
- We can hope this will not be a new normal, but, to prevent that, we need to act to reduce these risks.
What can we learn from this moment?
- This moment shows the risks we face if we do not address climate change and air quality together.
- Climate change is also a local health issue, and the greatest opportunity to equitably improve health of this century.