Tuesday, September 27, 2011

Wind power: questionable benefits, concealed impacts

Not really green after all:

... if a life-cycle study is warranted for hydraulic fracturing, because drilling might pass through subsurface formations containing fresh water, similar studies are certainly called for elsewhere: wind turbine manufacturing, installation and operation, for instance.

Turbines require enormous quantities of concrete, steel, copper, fiberglass and rare earth minerals – all of which involve substantial resource extraction, refining, smelting, manufacturing and shipping. Land and habitat impacts, rock removal and pulverizing, solid waste disposal, burning fossil fuels, air and water pollution, and carbon dioxide emissions occur on large scales during every step of the process.

Over 95% of global rare earth production occurs in China and Mongolia, using their technology, coal-fired electricity generation facilities and environmental rules. Extracting neodymium, praseodymium and other rare earths for wind turbine magnets and rotors involves pumping acid down boreholes, to dissolve and retrieve the minerals. Other acids, chemicals and high heat further process the materials. Millions of tons of toxic waste are generated annually and sent to enormous ponds, rimmed by earthen dams.

Leaks, seepage and noxious air emissions have killed trees, grasses, crops and cattle, polluted lakes and streams, and given thousands of people respiratory and intestinal problems, osteoporosis and cancer.
In 2009, China produced 150,000 tons of rare earth metals – and over 15,000,000 tons of waste. To double current global installed wind capacity, and produce rare earths for photovoltaic solar panels and hybrid and electric cars, China will have to increase those totals significantly – unless Molycorp and other companies can rejuvenate rare earth production in the US and elsewhere, using more modern methods.

Made in China turbines are shipped to the USA, trucked to their final destinations, and installed on huge concrete platforms; new backup gas generating plants are built; and hundreds of miles of new transmission lines are constructed. That means still more steel, copper, concrete, fuel and land. Moreover, the backup power plants generate more pollution and carbon dioxide than if they could simply run at full capacity, because as backups for turbines they must operate constantly but ramp up to full power, and back down, numerous times daily, in response to shifting wind speeds.

Wind farms require roads and 700-1000 ton concrete-and-rebar foundations, which affect water drainage patterns in farm country. The 300-500 foot tall turbines affect scenery, interfere with or prevent crop dusting over hundreds of acres, and kill countless birds and bats. Farmers who lease their land for wind turbines receive substantial royalty payments; neighbors are impacted, but receive no compensation.

Despite these ecological costs, wind farm projects are often fast-tracked through NEPA and other environmental review processes, and are exempted from endangered species and migratory bird laws that can result in multi-million-dollar fines for oil, gas and coal operators, for a fraction of the carnage.

Perhaps worst, all this is supported generously by renewable energy mandates, tax breaks, feed-in tariffs, “prioritized loading orders,” and other subsidies, courtesy of state and federal governments and taxpayers. In fact, wind power gets 90 times more in federal subsidies than do coal and natural gas, per megawatt-hour of electricity actually generated, according to US Energy Information Administration data. And wind-based electricity costs consumers several times more per kilowatt-hour than far more reliable electricity from coal, gas and nuclear power plants.
Simply put, the wind might be free, when it blows. But the rest of the “renewable, green, eco-friendly” wind energy system is anything but.

It might be far better all around to simply build the most efficient, lowest-polluting coal, gas and nuclear generating plants possible, let them run at full capacity 24/7/365 – and just skip the wind power.
Life-cycle studies would be a positive development – for all energy sources. In fact …
“Think globally, act locally” might be a very good motto for EPA and wind energy advocates.

- Paul Driessen  2/28/11

Paul Driessen is a senior fellow with the Committee For A Constructive Tomorrow and Center for the Defense of Free Enterprise, nonprofit public policy institutes that focus on energy, the environment, economic
development and international affairs.

No comments:

Post a Comment