Check if your London nursery, school or college is exposed to toxic air

How worrying are the nitrogen dioxide levels at your child's school?

Tens of thousands of children at more than 800 schools, nurseries and colleges in London are being exposed to illegal levels of air pollution that risk causing lifelong health problems.

The Guardian revealed on Friday that there are 802 educational institutions in the capital where pupils as young as three are being exposed to levels of nitrogen dioxide that are within 150 metres of nitrogen dioxide pollution levels that exceed the EU legal limit of 40g/m³ (40 micrograms per cubic metre of air).