00492nam a2200157Ia 450000500170000000800410001702000230005804000140008108200230009510000190011824500300013726000590016730000410022650400490026765000180031620231115103852.0220630s9999    xx            000 0 eng d  a9781782120063qhbk  aRDAc3228  aJR 363.73 HUMP223  aHumphrey, Gill 0aPollutioncGill, Humphrey  a{ place of publication not identify }bArcturus,c2013  a32 pages: color illustration,c27 cm  6Includes bibliographical reference and index  aAir pollution