Across the globe, air pollution is a leading cause of early deaths, surpassing all other environmental dangers. It significantly increases the chances of dying from serious health issues like lung cancer, heart disease, and respiratory infections. In Canada, often viewed as having cleaner air, air pollution still accounts for over 17,000 premature deaths and costs the economy around $140 billion annually.
Pollution sources such as heavy industry and wildfires can degrade outdoor air quality, posing immediate health risks. Climate change worsens this situation by altering temperature, wind patterns, and rainfall, which can enhance pollution and allow it to reach unhealthy levels.
Recent research predicts that by 2100, around 100 million Americans could be exposed to unhealthy air during summer months—seven times more than in 2000. This scenario forces many to choose between staying indoors or facing higher health risks.
Our study examined how climate change impacts both air quality alerts and health risks. We found that alerts could double for sensitive populations, which typically include infants, seniors, pregnant individuals, and those with pre-existing health conditions. Even in the U.S. and Canada, these alerts are uncommon, leaving many unaware of their risks.
Adapting to air quality alerts can dramatically improve health outcomes. Seniors over 65 and young adults up to 35 experience the greatest health benefits when they take precautions to avoid polluted air.
Unfortunately, many people lack awareness or resources to protect themselves. Only 15-20% of Americans typically take steps to reduce their exposure to air pollution, and for some, especially outdoor workers or those without stable housing, finding safe indoor spaces is a challenge.
Climate change also intensifies air quality issues, notably through increased wildfires. For example, the wildfires of 2023 made Canadian cities like Toronto some of the most polluted in North America, contributing to hazardous air quality levels in the U.S. as well.
Experts believe that without effective regulations, the air quality improvements made over the past five decades could be reversed. Policies to combat climate change can play a critical role in reducing these risks.
To address these challenges, it’s essential for everyone, particularly vulnerable groups, to track air quality in their areas and follow safety guidelines. This often includes limiting outdoor activity, ensuring good indoor air quality, and using proper masks during high pollution events.
As air quality alerts become more frequent, improving building ventilation and access to clean indoor spaces will be vital for long-term adaptation. The goal is not just to manage pollution but also to empower people to safeguard their health.
For more detailed information about air quality and its effects, please refer to Health Canada’s report on air pollution and the Environmental Protection Agency’s resources.
