the most easily polluted groundwater reservoirs area. salt reservoirs.
b. sewage plant reservoirs.
c. water-table aquifers.
d. artesian wells.

How did alexander fleming’s research solve a societal problem? he developed ways to treat inherited diseases. he advocated for regular hand washing to kill germs. he discovered a new type of medicine that could treat infections. he discovered the cause of mad cow disease, an emerging disease.