Singer: 'I wondered, what is the significance of this 2⁰C number -- and I concluded that it is the "Goldilocks" choice. It turns out, 2⁰C is "just right" -- not too small, not too large. Consider for a moment what would have happened if they had given a number like 0.5⁰C. People would have shrugged their shoulders and said, "Oh, we've already passed that threshold, and nothing has happened. So why worry?'
Ten years ago, on January 25, 2006, Al Gore stood before his Sundance audience at the screening of his “An Inconvenient Truth.” Al Gore waved his quivering finger in the air and told his audience that unless the world takes drastic measures to reduce greenhouse gases within the next 10 years, we will reach a point of no return.
Any agreement about anything involving nearly 200 nations will necessarily be primarily aspirational, exhorting voluntary compliance with inconsequential expectations — to "report" on this and "monitor" that. A single word change that brought the agreement to fruition: It replaced a command (nations "shall" do so and so) with an entreaty (nations "should" do so and so).