Researchers have found that electric cars might not be as green as they appear since their brakes produce emissions more toxic than diesel fumes.

Almost half of all copper in the air comes from brake wear.

Background Airborne fine particulate matter with diameter < 2.5 μm (PM2.5), can reach the alveolar regions of the lungs, and is associated with over 4 million premature deaths per year worldwide. Howe...