Pan american center for sanitary engineering

1.- Intyroducction. 2.- The concept of risk. 3.- Identification of hazards from chemical pollutants. 4.- Estableshing the relationship between the dose and the effect. 5.- Estimating the risck for humans. 6.- Resck to aquatic ecosystems. 7.- Putting the risk into comparative context. 8.- Risk management. 9.- The world of chemical

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