Tom writes, "Arizona is poor in natural gas, so you'd think it would escape the fracking controversy. Maybe not. The Copper State is one of the best places in the world to find helium, which has been in short supply. The catch is, it takes fracking to mine it. The pipeline company Kinder Morgan paid $30 million last year for fields rich in helium, and also CO2, which is used to pump the last drops of oil from old wells in Texas and New Mexico. Arizona may have rich, frackable deposits of shale oil, too. The Navajo Oil & Gas Co. has applied for a permit to do some exploring."