mid-15c., from Middle French attestation and directly from Latin attestationem (nominative attestatio) an attesting, testimony, noun of action from past participle stem of attestari to prove, confirm (see attest).
Work Environment. Epidemiologists generally work in clean, well-lit offices and laboratories. In addition to hospitals, epidemiologists work in colleges and universities, schools of public health, medical schools, and research and development services firms.
Most environmental scientists work for federal, state, or local governments, where they conduct research, advise on policy, and verify that businesses are following regulations. As of 2012, most environmental scientists (22%) worked in state government.