Cleaner air for bus riders

Thousands of Canadian school children are exposed to cancer-causing emissions from diesel school buses every day and, according to the annual Healthy Schools Day campaign, it is time to make sure that all schools are taking every possible action to reduce those exposures and risks.

“There are real, do-able and no-cost actions that every school board can take to reduce our children’s exposure to diesel emissions,” says Erica Phipps, executive director of the Canadian Partnership for Children’s Health and Environment (CPCHE).

While the campaign seeks to catalyze immediate and interim actions, it also urges investment in cleaner transportation technologies, such as electric buses powered by renewable energy sources, as the best way to protect children’s health and combat climate change.

Here are four ways to reduce exposure to diesel emissions:

STOP IDLING – Turn engines off while school buses are waiting in loading zones or near school grounds.

 AVOID BUS ‘CARAVANNING’ – Ensure there is a gap between buses during travel and in loading zones to keep the exhaust of one bus from polluting the cabin air of another. 

 CHANGE THE TIMING OF SCHOOL VENTILATION – Help reduce the infiltration of diesel bus and other vehicle emissions into schools by ensuring that high ventilation periods do not occur during busy loading/unloading times or rush hour.

UPGRADE AND REPLACE OLD BUSES – Emissions from older buses can be improved with pollution control upgrades, and new technology diesel engines offer vastly improved emissions performance. Best of all, replace old diesel vehicles with new buses powered by cleaner energy such as electricity.

A 2016 Health Canada assessment summarizes the multiple health problems associated with exposure to diesel emissions, including increased risk of lung cancer, heart disease, and worsening of asthma and allergy suffering, as well as some evidence of potential links to certain reproductive and developmental effects. Phipps also cites growing concern about the ability of ultra-fine diesel exhaust particles to reach and potentially harm the brain.

Scientists agree that children can be more vulnerable to respiratory effects from diesel emissions. Because children have more rapid breathing rates than adults, children can be more highly exposed to diesel particulates and other airborne pollutants.
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