Boxes water disinfection

Evidence of anthropogenic influence on the natural environment is widespread Examples include pesticide use (see Box 3-1), stratospheric ozone depletion (see Box 3-2), intercontinental transport of wind-borne dust and air pollutants, drinking water disinfection (see Box 3-3), and increasing levels of anthropogenic emissions into soils and groundwater. 

Box 1. Disinfection of filtered water using ozone and hydrogen peroxide (S. Muttamara C. Sales, 2000)... 

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