Tiny particles emitted by planes are putting millions of people across Europe at risk of serious health conditions, a study has found. Some 52 million people near the 32 busiest airports in Europe are being exposed to “ultrafine particles” (UFPs) from aviation, according to findings from the study, released on Tuesday. UFPs are below the size of 100 nanometres in diameter – approximately 1,000 times smaller than a human hair – and can penetrate deeply into the human body, having been found in the blood, brain and even placentas. Exposure to UFPs can be linked to the development of serious and …