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[MUSIC]

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Joan Cartan-Hansen, Host: Sewers 
or waste water treatment systems

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have problems because people put 
things down their drains that

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they shouldn't.

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Don't put household cleaning 
supplies or any wipes down the

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drain.

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It is very important not to 
flush medicine.

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Medicine isn't removed by 
wastewater treatment, so it

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stays in the water.

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And that can have a bad impact 
on aquatic species, even our own

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drinking water.

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In fact, there are only four 
things that should go into a

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toilet.

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We call them the four P's: Pee, 
Poop, Puke, the contents of your

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stomach when you vomit or toilet 
paper.

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And you should also be careful 
about what goes into your

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kitchen sink.

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It's attached to the waste water 
treatment process too.

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Don't put things like grease 
down the drain.

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Instead, let it firm up and then 
wipe it out of the pan with a

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paper towel and throw the wad 
away.

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Don't let bones, egg shells, 
coffee grounds, rice or pasta go

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down the drain.

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In fact, don't let anything go 
down your sinks or into your

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toilet that might cause a clog.

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For more information about 
sewage, check out the science

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trek website.

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You'll find it at science trek 
dot org