麻豆社

How serious is air pollution? And can we do anything to stop it? In February last year a study was published which suggested outdoor air pollution is contributing to about 40,000 early deaths a year in the UK.

In the first of three reports, Camilla Cavendish, journalist and former policy adviser to David Cameron, investigates whether anything has changed since then.

(Image: Oxford street monitor measures pollution levels, credit: 麻豆社).