Water and Environment: Hydropower in the United States is threatened with the removal of many of its dams under the guise of environmental betterment and in some cases based on the assumption that hydropower removed may simply be replaced with wind power added. Wind power has fallen in price as the swept areas and tower heights have increased. Wind power permitting is much faster, cheaper, and enjoys a higher success rate than does hydropower permitting. Advocates for rivers and fish have continued to lobby for dam removal, while they have endorsed wind power projects as an alternative to hydropower.