Which of the following is a disadvantage of hydroelectric plants?
a. high pollution
b. high construction costs
c. high operation and maintenance costs
d. low functional life span
e. all of these
Answer: B
Which of the following is a disadvantage of hydroelectric plants?
a. high pollution
b. high construction costs
c. high operation and maintenance costs
d. low functional life span
e. all of these
Answer: B