what pledge has the Biden administration made regarding reduction of U.S. greenhouse gas emissions at the Conference of the Party (COP) conferences? Group of answer choices The U.S. will cut its greenhouse gas emissions 50 percent below 2005 levels by 2030 The U.S. will cut its greenhouse gas emissions 50 percent below 2010 levels by 2050 The U.S. will cut its greenhouse gas emissions 50 percent below 2010 levels by 2030 The U.S. will cut its greenhouse gas emissions 25 percent below 2010 levels by 2050