A new study finds many schoolchildren across the U.S. face toxic levels of air pollution in their classrooms, with low-income groups and students of color far more likely to be affected. The findings, published in the journal Environmental Research, rely on EPA and census data to examine some 90,000 U.S. public schools. The study found that African-American and Latino students, in particular, are more likely to attend schools near industrial sources of air pollution tied to neurological harm—including lead, mercury and cyanide.