Leeds City Council is to trial a smart technology in vehicles that triggers engines to switch to zero emission in heavily polluted areas.Energy Live News reports that a consortium of automotive innovators, co-ordinated by Transport Systems Catapult will collaborate to capture real-time air quality readings to make the switch.It says the project aims to offer cities new ways to reduce urban air polution without additional charges to motorists or businesses.The report explains that "active geofencing' technology will be tested on a hybrid vehicle interface developed by Tevva Motors while transportation and Dynniq will develop a 'decision-making' engine capable of taking inputs from a range of city data, such as live air quality information and real-time traffic conditions.