Denver Post: Hydraulic fracturing ("fracking") and horizontal drilling are allowing the United States to produce more domestic oil and gas, bringing closer the once unthinkable prospect of America being a net energy exporter. But what are the international implications of America's newfound energy bounty on U.S. foreign policy? An initial caveat: fracking, or more accurately, oil and gas development, is an industrial activity and can cause negative environmental impacts. But many modern activities have environmental...