WATER POLLUTION DR MOHD HASNI HJ JAAFAR ENVIRONMENTAL PHYSICIAN DEPARTMENT OF COMMUNITY HEALTH, UKM MEDICAL CENTRE, MALAYSIA WATER 71% from earth surface. 97% salt water (sea) 3% fresh water 87% ice and glaciers, underground, air. 13% surface water (0.4% total water). Function
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DR MOHD HASNI HJ JAAFAR
DEPARTMENT OF COMMUNITY HEALTH, UKM MEDICAL CENTRE,
Mohamad Ismail Yaziz 1993