Photo: LIC/Flickr No matter how you measure it, the impact of air pollution is startling. According to new research, air pollution worldwide cuts life expectancy by 1.8 years for an average person…

Javier Morales Sarriera, Gurpreet Singh Sehmi |

Buses, cyclist, and car traffic in Santiago de Chile. Photo: Claudio Olivares Medina/Flickr Earlier this month, Santiago de Chile took delivery of 100 brand-new electric buses. The event was a…

Kavita Sethi, Bianca Bianchi Alves, Yin Qiu |