Groundwater+Pollution

=sources of pollution= =problem caused by pollution=
 * 1) =fertilizer=
 * 2) =pesticides=
 * 3) =herbisides=
 * 4) =arsinic=
 * 1) build up in nitrates wich and carsenijnect'
 * 2) bad bacteria kills the good bacteria

=ways to avoid polltion=
 * 1) =instead of using salt to melt snow or ice during the winter you can use kitty litter or sand=

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