Featured Research

from universities, journals, and other organizations

Use Of Wind Energy In US Growing, But Planning And Guidelines Are Lacking

Date:
May 3, 2007
Source:
National Academies
Summary:
Although the use of wind energy to generate electricity is increasing rapidly in the United States, government guidance to help communities and developers evaluate and plan proposed wind-energy projects is lacking, says a new congressionally mandated report from the National Research Council.

The Fossil Gulch Wind Park near Hagerman, Idaho, is comprised of seven GE 1.5 MW turbines, for a total capacity of 10.5 MW.
Credit: Stuart Van Greuningen, Idaho Energy Division / Courtesy of NREL

Although the use of wind energy to generate electricity is increasing rapidly in the United States, government guidance to help communities and developers evaluate and plan proposed wind-energy projects is lacking, says a new congressionally mandated report from the National Research Council. To inform the development of guidelines, the report offers an analysis of the environmental benefits and drawbacks of wind energy, along with an evaluation guide to aid decision-making about projects. As a case study, the committee that wrote the report looked at the mid-Atlantic highlands, a mountainous area that spans parts of West Virginia, Virginia, Maryland, and Pennsylvania. The report does not examine the impact of offshore wind-energy projects.

Related Articles


Currently, federal regulation of wind projects on private land is minimal, the report observes. And although some states have developed guidelines, wind energy is such a recent addition to the energy mix in most areas -- the nation's wind-energy capacity more than quadrupled between 2000 and 2006 -- that most states are relatively inexperienced at planning and regulation. Despite the growth in its use, wind energy still generates less than 1 percent of the nation's electricity. Some national-level policies to enhance the benefits of wind energy and minimize its harms would help guide state and local regulatory efforts, the report says.

Impacts on CO2 and Other Pollutants

A primary benefit of using wind to generate electricity is that it produces no carbon dioxide (CO2), a major greenhouse gas, or any other air pollutant. Based on U.S. Department of Energy projections for wind-energy development in the United States, the committee estimated that by 2020, wind energy will offset approximately 4.5 percent of the carbon dioxide that would otherwise be emitted by other electricity sources. In 2005, electricity generation accounted for 39 percent of the nation's total CO2 emissions.

The committee concluded that use of wind energy to generate electricity probably would not significantly reduce emissions of two other pollutants, sulfur dioxide and nitrogen oxides, because current and expected regulations of these are largely based on cap-and-trade programs. The degree to which emissions would be further reduced through special provisions to encourage wind-energy use -- such as set-asides, in which a percentage of emissions allowed under the cap are retired to the extent they can be offset by wind energy -- is uncertain, the committee added.

In the mid-Atlantic region, wind energy will likely contribute a lower proportion of electricity generation than it will in the United States overall, the report says; compared to other areas, a smaller portion of the region has strong, relatively steady winds.

Effects on Wildlife

Wind facilities can have certain adverse environmental effects on a local or regional level, by damaging habitat and killing birds and bats that fly into turbines. Among birds, the most frequent turbine fatalities are nocturnal, migrating songbirds, probably because of their abundance, the report says. However, the committee saw no evidence that fatalities from existing wind facilities are causing measurable changes in bird populations in the United States. A possible exception is deaths among birds of prey, such as eagles and hawks, near Altamont Pass, Calif. -- a facility with older, smaller turbines that appear more apt to kill such birds than newer turbines are.

Too little information is available to reliably predict how proposed new wind projects in the mid-Atlantic highlands would affect bird populations, the report says. As for bats, turbines placed on ridges -- as many are in the mid-Atlantic region -- appear more likely to kill them than turbines sited elsewhere. In fact, preliminary information indicates that in the mid-Atlantic highlands more bats are killed than expected based on experience with other regions, the committee said. Although scarce data make it hard to say how these deaths affect overall bat populations, the possibility of population effects is significant, especially if more turbines are added, given a general decline in several species of bats in the eastern United States.

Studies to evaluate possible ecological impacts should be conducted prior to choosing sites for wind facilities, the committee said, and follow-up studies should be conducted to measure actual effects. Additional basic research also is needed to help assess the short- and long-term impacts of these facilities on species at risk.

Impacts on Humans

A common objection to proposed wind projects is that they will have a negative aesthetic impact. The report outlines a process to help communities and developers assess a project's likely aesthetic effects, and suggests ways to minimize them -- for example, by using uniform types and sizes of turbines, and by ensuring that each region retains some undeveloped scenic vistas. The report also offers questions to ask, to help determine whether the aesthetic impact might be great enough to render a project unacceptable.

Wind projects also can be disruptive because of noise and shadow flicker, a strobelike effect caused by rotating turbine blades. The report recommends that noise surveys be conducted before a project is sited, and that processes be set up to respond to noise complaints. Shadow flicker has generally not been a problem at wind facilities in North America, the report says; new turbines can be located so that their shadow paths avoid residences, or operations can be halted during times when troublesome flicker occurs.

The report also considers beneficial and adverse economic effects on local areas -- such as effects on landowners, the regional economy, and local government revenues -- and recommends measures to anticipate and mitigate potential problems. In addition, the report discusses possible electromagnetic interference with local installations such as radar.

Improving Planning and Regulation

Governments at the state and local levels should provide developers and the public with guidance to help them plan for wind-energy development, including guidance on procedures and information needs for assessing projects, the report says. It also recommends that regulatory agencies adopt an evaluation guide to review proposed projects, and that governments work with each other and with organizations and developers to create guidelines for weighing projects' costs and benefits at scales ranging from local to national.

The report was sponsored by the White House Council on Environmental Quality. The National Academy of Sciences, National Academy of Engineering, Institute of Medicine, and National Research Council make up the National Academies. They are private, nonprofit institutions that provide science, technology, and health policy advice under a congressional charter. The Research Council is the principal operating agency of the National Academy of Sciences and the National Academy of Engineering.


Story Source:

The above story is based on materials provided by National Academies. Note: Materials may be edited for content and length.


Cite This Page:

National Academies. "Use Of Wind Energy In US Growing, But Planning And Guidelines Are Lacking." ScienceDaily. ScienceDaily, 3 May 2007. <www.sciencedaily.com/releases/2007/05/070503110317.htm>.
National Academies. (2007, May 3). Use Of Wind Energy In US Growing, But Planning And Guidelines Are Lacking. ScienceDaily. Retrieved December 19, 2014 from www.sciencedaily.com/releases/2007/05/070503110317.htm
National Academies. "Use Of Wind Energy In US Growing, But Planning And Guidelines Are Lacking." ScienceDaily. www.sciencedaily.com/releases/2007/05/070503110317.htm (accessed December 19, 2014).

Share This


More From ScienceDaily



More Matter & Energy News

Friday, December 19, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Building Google Into Cars

Building Google Into Cars

Reuters - Business Video Online (Dec. 19, 2014) Google's next Android version could become the standard that'll power your vehicle's entertainment and navigation features, Reuters has learned. Fred Katayama reports. Video provided by Reuters
Powered by NewsLook.com
AP Review: Nikon D750 and GoPro Hero 4

AP Review: Nikon D750 and GoPro Hero 4

AP (Dec. 19, 2014) What to buy an experienced photographer or video shooter? There is some strong gear on the market from Nikon and GoPro. The AP's Ron Harris takes a closer look. (Dec. 19) Video provided by AP
Powered by NewsLook.com
Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Double-Amputee Becomes First To Move Two Prosthetic Arms With His Mind

Buzz60 (Dec. 19, 2014) A double-amputee makes history by becoming the first person to wear and operate two prosthetic arms using only his mind. Jen Markham has the story. Video provided by Buzz60
Powered by NewsLook.com
Navy Unveils Robot Fish

Navy Unveils Robot Fish

Reuters - Light News Video Online (Dec. 18, 2014) The U.S. Navy unveils an underwater device that mimics the movement of a fish. Tara Cleary reports. Video provided by Reuters
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins