It seems wind power is actually under attack by environmentalists. Believe it or no, wind power has been shut down in at least one case by environmental concerns. You ask; "How can wind power cause environmental problems?" The blades kill birds. That's it in an egg shell.
At Altamont Pass, east of San Francisco, there are thousands of wind generators. Many of these are older, fast-spinning blade types. These tend to be deadly to birds. Environmentalists have objected and the company has decided to shut down a portion of the field during peak migration and plans to replace the older units with newer, safer to birds units.
Environmental groups have blocked a wind power project in the Mojave Desert, objected to one in Nantucket Sound, and noted the death of bats from blades in the Appalachians and are encouraging increased care in selection of sites and use of bird-safe blades.
While more than a million and a half homes are powered by electricity generated by wind power in the United States, it makes one wonder what environmental concerns will come up as we try to protect the environment by getting off fossil fuel.