Negotiators love 350 ties -- almost as much as they love seeing photos from the 10/10/10 events in their countries, by way of demonstrating that the people in their countries (you!) are in support of the 350 target, and in support of them when they promote it.

Thanks to the pressure of a growing global movement, over 100 countries are now calling for the goal of reducing carbon dioxide emissions in the atmosphere below 350 parts per million and stabilizing global temperature rise below 1.5 degrees Celsius.