Voice of America: As U.S. President Barack Obama prepares to head to Copenhagen and the international climate change conference, members of Congress are weighing in with advice. There are deep differences over the right approach to global warming. On a Sunday when the climate conference officially was on a break, the debate raged on in the United States. On the Fox News Sunday television program, opposing views came to the fore. On the one side: James Inhofe, a Republican Senator from …