Investigating the increased risk of heart disease, lung cancer, and tumours from bringing jets to Toronto’s waterfront communities.

There’s growing concern about a new category of unregulated airborne pollutants, so tiny they can pass through the lungs and into the bloodstream. For The National, CBC’s Ashley Fraser explains ultrafine particles (UFPs) and why scientists say they have the potential to cause major health problems.

New data reveals that concentrations of airborne ultrafine particles are higher across the BQN than they would be without the airport.