Nonnative species are only introduced unintentionally.
Which of the following is the most serious effect of water pollution for humans?a.infectious diseasesb.algal bloomsc.toxic food chain effectsd.low-oxygen water
Recreational activities can cause an increase in erosion rates.
The water reclamation process is used to remove solids and impurities, but does not return water to a potable state.
Which of the following is an example of mechanical control of nonnative species?a.pesticidesb.herbicidesc.net barriersd.inspections
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