The capital’s poor air quality has inspired naturally energising drink brand TENZING to launch its Clean Air Tracker, in partnership with King’s College London; designed to help active Londoners find healthier ‘clean air routes’ in the Big Smoke. London’s toxic air pollution levels are almost as bad as Beijing or New Delhi, and the cause of thousands of early deaths each year from lung and heart disease. Runners are potentially at the highest level of risk and completely unaware of this silent and invisible killer. Londoners running around the city breathe much more heavily than pedestrians and therefore flood their lungs with pollutants. But with the aid of innovative technology, they can escape this.