Evander Childs High School students test Bronx River for pollution

Some Evander Childs High School students are testing the Bronx River to see if it is polluted.

The students measure the pH and oxygen levels, and depth of the river every week. They say the testing helps determine how hospitable the river is for plants and animals.

Last week, some students placed trout in the river. Students say they used trout because they are known to die in the presence of pollution. The students plan on checking each week to see if the trout survive.

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