Is breathing in bus exhaust bad?

Children, in particular, are at risk from diesel exhaust fumes. Of biggest concern are the ultrafine particles called microparticles that can go deep within the lungs or even enter the bloodstream, Stroebel said. They can trigger asthma and other respiratory responses as well as cancer and other diseases over time.



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These exhaust emissions contain pollutants like carbon monoxide, nitrogen oxides, and particulate matter, which can cause health issues ranging from minor respiratory problems to severe conditions such as heart disease and cancer.

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In fact, propane-burning school buses emit more carbon monoxide than diesel-burning school buses and just as many greenhouse gases — the only benefit of propane-burning buses over diesel are for nitrogen oxide emissions, AFLEET data demonstrates.

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