دیکشنری تخصصی مهندسی نفت - نسخه آنلاین

n pi: those air pollutants that fall under NAAQS: particulates, ozone, carbon monoxide, nitrogen dioxide, lead, and sulphur dioxide. Sometimes called criteria pollutants.

n pi: the six air pollutants listed under NAAQS in the CAA: ozone, carbon monoxide, sulfur dioxide,lead. nitrogen dioxide, and particulate matter. Sometimes called conventional pollutants.

n pi: (NAAQS) standards listed under the CAA for six major, or criteria, pollutants: ozone, carbon monoxide, sulphur dioxide, lead, nitrogen dioxide, and particulate matter. Areas that exceed the recommended levels for these pollutants are nonattainment areas, or areas with poor air quality;areas that meet or fall below the NAAQS levels are attainment areas, or areas with good air quality.

ozone.

n: at ground level, one of the primary ingredients in smog and a poisonous form of pure oxygen. Smog ozone is created by sunlight acting on nitrogen oxides and volatile organic compounds in the air. Ozone high in the atmosphere forms the Earths main shield against the suns ultraviolet radiation.

n: a layer of ozone in the atmosphere that forms the Earths main shield against the suns ultraviolet radiation, which in large doses increases the risk of cancer (especially skin cancer and melanoma),health problems, and crop damage.