PENCEMARAN AIR. DR MOHD HASNI HJ JAAFAR UNIT KESIHATAN PERSEKITARAN JKM, PPUKM MALAYSIA. KEPENTINGAN AIR. 71% dari permukaan dunia. 97% air masin (laut) 3% air tawar 87% ais dan glaciers, air bawah tanah, udara. 13% air permukaan (0.4% jumlah air). Kepentingan air Domestik. Industri.
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DR MOHD HASNI HJ JAAFAR
UNIT KESIHATAN PERSEKITARAN JKM, PPUKM
Mohamad Ismail Yaziz 1993