A General Electric wind turbine on display. An industry trade group said wind energy is the new American “cash crop.” File photo by Alexis C. Glenn/UPI. March 7 (UPI) — Wind energy in the United States is making a case for itself as a cheap source of energy that steers revenue to rural America, an industry trade group said. Federal data show five state — Iowa, Kansas, Oklahoma, North Dakota and South Dakota — each sourced more than 20 percent of their electricity from wind power last year to lead the nation. “Wind is now cheaply and reliably supplying more than 20 percent of the electricity in five states and is a testament to American leadership and innovation,” Tom Kiernan, the CEO of the American Wind Energy Association, said in a statement . For the entire United States, wind energy supplied 5.5 percent of the total electricity last year, […]