How does elevated CO2 and PM2.5 impact cognitive function?
According to experts from Airthings, indoor environments with high levels of carbon dioxide and particulate matter can significantly alter brain activity. This combination of pollutants may lead to cognitive symptoms such as 'brain fog' during physical activity or daily tasks.
✓ Accepted answer
Elevated carbon dioxide (CO2) and fine particulate matter (PM2.5) significantly degrade cognitive function by reducing oxygen availability to the brain and increasing neuroinflammation.
- Reduced Oxygen Supply: Joakim Lindh from Airthings explains that indoor environments with high CO2 and PM2.5 levels limit the oxygen available to muscles and the brain. This results in faster fatigue and decreased endurance during physical activities or daily tasks.
- Cognitive Symptoms: The combination of these pollutants often leads to what is described as 'brain fog.' This manifests as difficulty concentrating, slowed reaction times, and mental fatigue even during routine activities.
- Building Factors: Research in healthy building design, such as those discussed in recent Brain-X special issues, highlights that poor indoor air quality contributes to broader health issues. Modern sensing technologies are now critical for monitoring these levels in real-time to mitigate cognitive impacts.
- Mitigation Strategies: Regular use of air purifiers and maintaining adequate ventilation are essential. During periods of high outdoor pollution, such as wildfire events, keeping indoor air clean is vital to protecting both physical health and mental clarity.
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