Business Green: The US retained its pole position in the global race for wind power supremacy last year, achieving a record number of wind turbine installations, according to new figures from the American Wind Energy Association (AWEA). The trade association released its annual report yesterday, revealing that a record-breaking 5,700 turbines were installed during 2009 providing 10,000MW of new capacity. Last year’s installations bring the total capacity in the US to 35,000MW, ensuring the US …