Still, the rest of the world must be clear about the implications of the agreement shaping up in Paris. Calling 2.7 to 3.5 C of warming a success is akin to saying, when leaping a canyon 15 feet wide, that leaping only 10 feet is no cause for alarm. After all, 10 feet is farther than you’ve leaped in the past and represents undeniable progress towards the ultimate goal.
http://www.thenation.com/article/the-most-ambitious-emissions-pledges-on-the-table-in-paris-would-still-result-in-catastrophic-warming/