Sadiq Khan on Friday made a “full and unqualified apology” to the mother of a nine-year-old London girl who died because she lived near roads with illegal levels of toxic air.At an event at City Hall, the mayor said sorry to Rosamund Adoo-Kissi-Debrah for the loss of her daughter Ella in 2013.Despite not being mayor at the time, he said the Greater London Authority and Transport for London should have acted sooner to tackle pollution.Ella, who died on February 15, 2013, from a fatal asthma attack, was the first person in the world to have air pollution listed as a cause of death on her death certificate.