Air Pollution: Tailpipe controls on buses don't clear the air inside bus cabins

As iconic yellow buses transport children to and from school, their diesel engines deliver big doses of air pollutants. In response, school districts have started retrofitting their buses to cut tailpipe emissions. But a new study shows that while these measures may help clean outdoor air, they have virtually no impact on the air inside bus cabins.

The majority of electricity production in the United States comes from the combustion of fossil fuel. However, the low price of electricity derived from fossil fuels such as coal do not reflect the complete cost.