(Corrects first paragraph of July 8 story to reflect Cheniere believes the pollution rule could “reduce shipments” of LNG instead of “shut” them, and changes fifth paragraph to replace the word “huge” with “significant” when referring to the financial risk to the company.) By Valerie Volcovici WASHINGTON (Reuters) -Cheniere Energy Inc has asked the Biden administration to exempt it from limits on emissions of cancer-causing pollutants, arguing they would reduce shipments from the top U.S. exporter of liquefied natural gas for an extended period and endanger the country’s efforts to ramp up sup…