Business Green: Wind power installations in he US to date this year have dropped by 57 per cent and 71 per cent from 2008 and 2009 levels, respectively, according to the American Wind Energy Association (AWEA). Around 700MW of wind energy capacity was added in the second quarter of 2010. US manufacturing investment has also fallen below 2008 and 2009 levels. The US Government’s tendency to blow hot and cold over incentives like the renewable electricity standard (RES) is to blame, says the …