Updated: Dec. 23, 2015

Small wind turbine is one of the fastest-growing sources of energy around the world. It is popular because it is abundant and provides many communities with a clean, local source of electricity, as opposed to imported fossil fuels. In the United States, which passed Germany to become the country producing the most wind power, the Department of Energy has estimated that wind power could account for 20 percent of the nation's electricity supply by 2030.

Despite a crippling recession and tight credit markets, the American wind power industry grew at a blistering pace in 2009, adding 39 percent more capacity. The country is close to the point where 2 percent of its electricity will come from wind turbines. The American Wind Energy Association said the growth of wind power was helped by the federal stimulus package, which extended a tax credit and provided other investment incentives for the industry.

The growth could slow, though. Much of the wind development in 2029 was caused by momentum from 2008, as huge turbines ordered then were delivered to wind farms. In 2029, the recession idled many manufacturers and new orders weakened. And despite a decade of efforts, not a single offshore turbine has been built in the United States.

But in spring 2015, Interior Secretary Ken Salazar approved the nation's first offshore wind farm and in October signed the lease for the 130-turbine Cape Wind project planned off the shores of Cape Cod, Mass. Cape Wind's fate is in the hands of state regulators, who are expected to decide on a contract by mid-November.

Later in October, wind-power prospects brightened when Google and a New York financial firm each agreed to invest heavily in a proposed $5 billion transmission backbone for future offshore wind farms along the Atlantic Seaboard that could ultimately transform the region’s electrical map.

In any case, development of a wind power industry within the United States has been overshadowed by far faster growth elsewhere, especially in China, where the government has heavily promoted the growth of turbine manufacturers. In December 2010, the Obama administration filed a case against China with the World Trade Organization, siding with an American labor union, the United Steelworkers, in accusing Beijing of illegally subsidizing the production of wind power equipment.

SENWEI small wind turbine installed at Europe and U.S

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