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From left, David Yeom, intern with Washington University; Tyler Cargill, Washington University doctoral student with the Jay Turner Lab; and Li Zhiyao, also a doctoral student with the Jay Turner Lab, work with the Rev. Nick Winker to set up an air pollution monitor at St. Ann Catholic Church in St. Louis. (RNS Photo/Beth Gutzler)
Students from Washington University in St. Louis work with the Rev. Nick Winker to set up an air pollution monitor at St. Ann Catholic Church in St. Louis. (RNS Photo/Beth Gutzler)