Groundwater as a water source may be better than surface water ...

[Alainaaa8]

Groundwater as a water source may be better than surface water because
 
  A) groundwater may be naturally purified by percolation through soil.
  B) groundwater is a self-replenishing resource that cannot be exhausted.
  C) surface water is not naturally self-replenishing.
  D) groundwater is more easily located than surface water.

Question 2

Some of the most toxic organic compounds, widely used in plastics, pesticides, and solvents, are the
 
  A) heavy metals.
  B) chlorinated hydrocarbons.
  C) sulfated hydrocarbons.
  D) radioactive hydrocarbons.

[elyse44]

Answer to Question 1

A

Answer to Question 2

B