Definicija: An assessment of the nature and extent of any harm or detriment, or any possible harm or detriment, that may be inflicted on any aspect of the environment by any activity process, development programme, or any product, chemical, or waste substance. Audits may be designed to: verify or otherwise comply with environmental requirements; evaluate the effectiveness of existing environmental management systems; assess risks generally; or assist in planning for future improvements in environment protection and pollution control

Definicija: Ocena narave in obsega dejanske ali možne škode ali izgube, ki jo povzroči delovni proces, razvojni program ali kakšen drug izdelek, kemikalija ali odpadek, raznim prvinam okolja. Pregledi so lahko namenjeni: preverjanju ali podreditvi okoljskim zahtevam; oceni splošnega tveganja; kot pomoč pri načrtovanju za bodoče izboljšave za varstvo okolja in omejevanje onesnaževanja.