Did London air pollution kill nine-year-old Ella?

This Friday marks six years since Ella Kissi-Debrah's death, which her mother believes was partly caused by air pollution. Plus: 15-year-old George Bond explains why he is going on today's school climate strike Ella Kissi-Debrah lived 25 metres (82ft) from the heavily polluted South Circular Road in Lewisham, London. She died in February 2013 at the age of nine after three years of seizures and 27 visits to hospital for asthma attacks. Until the end of 2010, Ella had been in good health. An expe...