The energy efficiency of buildings can be improved by all of the following strategies, except
a. use of energy-efficient appliances
b. use of energy-efficient compact fluorescent light bulbs
c. plugging leaks
d. building big windows into the northern side of new housing
e. energy-efficient lighting
Answer: D
If the answers is incorrect or not given, you can answer the above question in the comment box. If the answers is incorrect or not given, you can answer the above question in the comment box.