There are significant differences in how much people are exposed to air pollution, according to a new study co-authored by MIT scholars that takes daily mobility into account.The study, based in the Bronx, New York, does not just estimate air pollution exposure based on where people live or work, but uses mobile data to examine where people go during a typical day, building a more thorough assessment of the environment’s impact on them.The research finds exposure to particulate matter 2.5 microns or bigger rises by about 2.4 percent when daily…