by Claudia Carter
Air pollution has once again become one of the biggest concerns for cities with hard-hitting evidence emerging on the high numbers of premature deaths and the range of health and environmental impacts. While air pollution from industrial processes has been significantly curbed, transport emissions have over the past 40 or so years become the main contributor. Part of the problem has been the sharp rise in diesel cars, traffic congestion (ever increasing numbers of vehicles on the road and stop and start driving) and dirty ‘old-tech’ private and public transport vehicles along with newer less than adequate performing engines (or poor driver skills). Evidence has also emerged on the significant contributions of particulate matter (PM) – and especially particles less than 2.5 micrometres (called PM2.5) that can penetrate deep into the lungs – coming off tyres and breaks even if the engines are relatively clean or emission free (e.g. with the increase in hybrid and electric vehicles)   . Continue reading What role can planning play in improving urban air quality?