sentences:  Attaran has had a diverse career as a scientist, lawyer, scholar, and advocate for public health, human rights and environmental protection.While a graduate student at Oxford, the university secretly ordered its scientists to "remove radioactive warning labels" from dangerous laboratory waste, and instructed them to dispose of it covertly in the city's sewerage and rubbish bins.Scientists in the Department of Zoology where Attaran was based opposed the policy as "unacceptable", and Attaran waged a successful whistleblowing campaign that reversed it.