redOrbit: The White House labeled hydrofluorocarbons a very significant hazard to climate change on Monday, and wants HFCs that are endorsed under the U.N.’s ozone treaty dramatically condensed instead of eliminating them entirely. However, a senior State Department official did not endorse an official plan, created last week by the nations of Micronesia and Mauritius, to change the Montreal Protocol ozone treaty that would reduce HFCs by 90% by 2030. The treaty endorses the use of HFCs, …