ABC News: Secretary-General of the United Nations, Ban Ki-moon, quietly walks into the room. His demeanor is humble, despite the paparazzi that chase his every move. His task at the U.N. Climate Change Conference, to get nearly 190 countries to agree on an environmental road map, has just been put on the clock; he has a deadline of Friday at noon. “This is an issue affecting the whole of humanity,” Ban says. “The world is changing much faster than we have thought. The …