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Swimming is an enjoyable aerobic activity that can help children develop strength, flexibility, and endurance. A 1991 study found that the hundreds of thousands of young people enrolled in organized swim programs throughout the United States are t...
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Disinfection is the most important step in the water treatment process to destroy pathogenic bacteria and other harmful agents. Chlorination is a very common and effective method for the disinfection of drinking water, and it has been the single m...
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