From cheeky aubergines to friendly smiley faces, emojis now form a staple part of many of our daily messages. But which characters are the most popular in the UK?

For each 1-μg/m3 increase in the past 2-year average smoke PM2.5, the risk for heart failure was increased by 1.014% compared with nonsmoke PM2.5; annually, this association corresponded to an ...