The American Wind Energy Association warned last week that the American wind energy industry could lose about 10,000 jobs this year as uncertainty about the expiring production tax credit leads to increasing layoffs. Siemens Energy Inc. announced September 18 that 615 workers would lose their jobs at manufacturing facilities in Iowa, Kansas, and Florida, partially due to the uncertain future of the PTC. Should the credit not be extended, that number could grow to 37,00 jobs by the end of the first quarter of 2013.