00000nam 2200000za 4500 9.611596 CaOODSP 20230110141057 ta 150406|1994||||xxc||||| f|0| 0 eng d 0-662-22635-6 CaOODSP eng n-cn--- En49-8/7-4E Canada. Environment Canada. Environmental Protection Service. National urban air quality trends, 1981-1990 / by Tom Furmanczyk. Issued by the Pollution Data Branch, Response Assessment Directorate. Ottawa - Ontario : Environment Canada. 1994. xiv, 57p. : figs., graphs, references, tables ; 28 cm. Environmental Protection series. Urban pollution EPS 7/UP/4 "This is the eighth in a series of reports issued by Environment Canada on ambient air quality trends. Its purpose is to report trends in the ambient air quality data collected through the National Air Pollution Surveillance (NAPS) Network and to identify significant changes by statistical and other forms of analysis."--Introduction. This is the eighth in a series of reports issued by Environment Canada on ambient air quality trends. Its purpose is to report trends in the ambient air quality data collected through the National Air Pollution Surveillance (NAPS) Network and to identify significant changes by statistical and other forms of analysis.--Introduction Softcover 96-30 1996-07-26 Air quality gcpds Furmanczyk, Tom National urban air quality trends, 1981-1990 / (CaOODSP)9.918974 Environmental Protection series. Urban pollution ; EPS 7/UP/4 (CaOODSP)9.514583