Avoiding air pollution not only benefits your lungs but also your brain, according to a McMaster University expert. Russell de Souza, a professor at the university, highlighted that prolonged exposure to two common air pollutants could lead to minor changes in brain health. The study, co-authored by de Souza and published in the journal Stroke, analyzed approximately 7,000 Canadians’ brain health performance concerning exposure to air pollution.
Participants, averaging 57 years old and hailing from various Canadian provinces, were assessed for their exposure to air pollution in the preceding five years. The study focused on fine particulate matter, often present in wildfire smoke and industrial emissions, and nitrogen dioxide, a gas found in vehicle exhaust.
Using cognitive tests, researchers evaluated brain health, including memory and cognitive efficiency. De Souza explained that the study revealed lower scores on these tests due to exposure to the air pollutants. Although the declines were subtle, de Souza emphasized the importance of early detection to prevent further deterioration.
While Canada has made significant progress in reducing air pollution, factors like climate-driven wildfires have offset some gains. De Souza cautioned that pollution levels are typically higher near transportation hubs and suggested checking daily air quality updates for potential risks. Health Canada recommends indoor measures to reduce exposure to fine particulate matter and nitrogen dioxide.
De Souza’s research, conducted as part of the Canadian Alliance for Healthy Hearts and Minds study, aims to understand the long-term impact of air pollution on cognitive decline. The study received support from various organizations, including the Canadian Partnership Against Cancer and the Heart and Stroke Foundation of Canada. Further research is necessary to determine the impact of sustained air pollution exposure on brain health and the potential benefits of improved air quality.
