The U.S. government will require natural gas drillers to disclose which chemicals they use in hydraulic fracturing on public lands, according to draft rules crafted by the Interior Department...Fracking has allowed companies to tap a wealth of new natural gas reserves but critics say the procedure has polluted water and air...The Environmental Protection Agency late last year issued a draft study that said fracking fluids likely polluted an aquifer that supplies public drinking water in Wyoming...The energy industry complained that the draft rules were overkill as companies were voluntarily revealing the fluids...Jared Polis, a Democratic U.S. Representative from Colorado [said] "It's essential to disclose fracking chemicals anywhere they're used in order to protect the public's health in populated areas where those chemicals are most likely to affect the our air, water and health," he said. [refers to Chesapeake Energy]