What is a problem with using wind turbines to produce energy?

• A. Wind turbines occupy only a small area of land.
• B. Wind turbines are efficient only in certain areas.
• C. Wind energy produces a large amount of energy.
• D. Wind turbines create a large amount of pollution.

Answer: (B)

The main idea here is that wind energy depends on how much wind is available. Wind turbines generate electricity best when wind is strong and fairly steady. In places where wind is weak or highly variable, the turbines don’t produce much energy, so relying on wind power can be unreliable. That’s why the best description of a problem with using wind turbines is that their efficiency depends on location—some areas are much more suitable for producing power than others.

The other statements aren’t the core drawback: wind farms don’t inherently produce a large amount of pollution, and while land use and other factors matter, the key limitation most often discussed is the variability and dependence on wind resources.