Air pollution: black, Hispanic and poor students most at risk from toxins – study

• 'Children are facing risks that will affect their ability to learn'
• Study covered 90,000 schools across the US

Schoolchildren across the US are plagued by air pollution that's linked to multiple brain-related problems, with black, Hispanic and low-income students most likely to be exposed to a fug of harmful toxins at school, scientists and educators have warned.