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.
Environmental scientists may analyze samples in a laboratory. Ecology is one type of environmental science job. Environmental scientists may work on plant science or hydrology. Some environmental scientists research the impacts of drought on the soil ecosystem.