We're sitting idle on the toxic fumes harming our kids

There's no safe air pollution level and idling cars can cause harm hotspots, authorities say. (George Chan/AAP PHOTOS)

The drop-off and pick-up line has become a cleaner, quieter place at the primary school Anthony Hull and Fiona Foo send their kids to.

Parents now diligently switch off their combustion engines to prevent harmful pollutants spewing into the air.