How many of the following statements regarding thermal pollution are incorrect?
a. Heated wastewaters flowing out of electricity-generating units, e.g., thermal power plants, constitute important category of pollutants.
b. Thermal wastewater eliminates or reduces the number of organisms sensitive to high temperatures.
c. It may enhance the growth of plants and fish in extremely cold areas but, only after causing damage to the indigenous flora and fauna.
d. Thermal wastewater increases the number of organisms sensitive to high temperatures.
 

• A

  four

• B

  two

• C

  three

• D

  one