Why is wind energy controversial? question 27 options: 1) wind energy needs fossil fuels. 2) wind energy is expensive. 3) wind energy is nonrenewable. 4) wind energy can harm migrating birds.

4. the birds fly right into them, also some can make a low frequency noise that damages hearing.

4) Wind energy can harm migrating birds would be the correct answer. Wind turbines pose a huge threat to birds because they collide with the turbine blades.

1 and 3 are not true. And while 2 is somewhat true because building wind turbines is somewhat costly, wind energy is usually used in areas that meet a wind speed requirement, so that its benefits outweigh the costs. Addtionally, its much cheaper than other forms of energy.