Living in one of the busiest cities in the world, how often do you think about air pollution? As Londoners, we have often experienced (but probably turned a blind eye to) the adverse effects of this often invisible reality. But since nine-year-old Ella Adoo-Kissi-Debrah from Lewisham became the first person in the UK to have air pollution listed as the cause of death, it is clear we need to take action. Euston Road has historically been Camden’s most polluted monitoring site.