The health of our brain is vital to our health and longevity. A recent study at the University of British Columbia and the University of Victoria has shown that “common levels of traffic pollution can impair human brain function in only a matter of hours.” Only 2 hours of exposure “to diesel exhaust causes a decrease in the brain’s functional connectivity – a measure of how different areas of the brain interact and communicate with each other.” This study is the first to show that air pollution negatively impacts the brain. How can we protect ourselves? If you’re stuck in traffic, roll your windows up, make sure your car’s air filter is properly working and, if you’re walking, take a less busy street.