More than 60,000 students in Los Angeles attend school within 500 feet of a highway, and seven more traffic-spooning campuses are in the works, despite health experts’ warnings that such pollution-proximate students are at increased risk of asthma and other illnesses. All of the schools will be built with air-filtration systems, but such systems do not reliably remove the smallest, most dangerous particulate pollution. So long, sick days; c’mon in, sick year.