Obama signed an executive order in October requiring federal agencies to set their goals for reducing greenhouse gas emissions within 90 days . Federal mandate to reduce greenhouse gas emissions 28 percent . Government has responsibility ` ` to reduce our energy use , '' Obama said . White House energy reductions will amount to $ 8 billion to $ 10 billion in avoided energy costs .
Federal mandate to reduce greenhouse gas emissions 28 percent . Government has responsibility ` ` to reduce our energy use , '' Obama said . White House energy reductions will amount to $ 8 billion to $ 10 billion in avoided energy costs .