are an inexpensive source of energy. cause little pollution to the environment. may hurt the flying animals in the area. are a renewable source of energy.
I am hesitating between 4 options to answer the following question, which option should I choose?
Question: Wind is becoming more common as a source of energy. Wind farms require large open spaces for the wind turbines. A negative consequence of this technology is wind turbines
Possibilities:
- are an inexpensive source of energy.
- cause little pollution to the environment.
- may hurt the flying animals in the area.
- are a renewable source of energy.

may hurt the flying animals in the area.