Forbes: Dow Chemical is investing $6 billion to enlarge its manufacturing facilities in the United States by 40 percent, based on a wager that low natural gas prices here will persist into the middle of the next decade, a Dow executive said in Chicago this week. The investment reverses Dows vocal exodus from manufacturing in the United States, said Doug May, Dows business president of olefins, aromatics, and alternatives, during the Kellogg Energy Conference Wednesday at Northwestern University. Were...