Cycle lanes, electric cars and other interventions have helped 19 global cities slash levels of pollutants by more than 20% London, San Francisco and Beijing are among 19 global cities that have achieved “remarkable reductions” in air pollution, analysis has found, having slashed levels of two airway-aggravating pollutants by more than 20% since 2010.The analysis found interventions such as cycle lanes, uptake of electric cars and restrictions on polluting vehicles had helped to drive the improvements. Continue reading...