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One student, writing to Chancellor Ferebee Taylor, complained that he [had] one class with four no smoking signs posted in it but the professor continually ignored the enforcement of these signs while students continue[d] to smoke. He also described attending a program in Memorial Hall where despite no smoking signs, dozens of students smoked, leaving many in a cloud. In March 1975, students from the School of Public Health began pushing for a ban on all smoking in classrooms, citing the unpleasant environment it created for nonsmokers as well as growing evidence that passive smoking (second-hand smoke) was a health hazard