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{{ActivityBox|How To Disinfect Water with Sunlight| Solar disinfection is 
an effective way to disinfect water with only sunlight and a bottle. 
Filtering or settling the water first will make it clearer so it will 
disinfect more quickly. Solar disinfection works best in countries 
close to the equator, because the sun is strongest there. The farther 
north or south you are, the more time is needed for disinfection to work.<br />(For more information about solar disinfection, see Resources.)
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How To Disinfect Water with Sunlight

Solar disinfection is an effective way to disinfect water with only sunlight and a bottle. Filtering or settling the water first will make it clearer so it will disinfect more quickly. Solar disinfection works best in countries close to the equator, because the sun is strongest there. The farther north or south you are, the more time is needed for disinfection to work. (For more information about solar disinfection, see Resources.)

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2. so is this
3. this too