London schools tackle pollution with face masks and air purifiers

Schools introduce walk-to-school initiatives and stock up on asthma medicine

Schools across the UK are taking ever more drastic steps in an effort to mitigate the effects of air pollution on their pupils' health.

Amid growing concern about the long-term implications of toxic air on young people's development, the Guardian has found one London school is raising money for face masks for its pupils, while a growing number are installing air purifiers in classrooms and thousands more are trying to deter parents from using their cars on the school run.