The Climate Summit has many moving parts; the sum of these parts will determine its success. The Summit will reinforce and complement the Paris 2015 agreement. Alone it is unlikely to be transformational but it can be bold and can demonstrate political intent. The Summit’s success will pave the way for Paris by:

Demonstrating collective political responsibility to fulfil the 2°C obligation

The variety of leaders attending across the political and geographic spectrum already provides a good talisman on this score. It is not any one country that has responsibility; it requires diverse and collective approaches from all corners of the world. A new crop of leaders is coming to the fore to include Italy's Matteo Renzi, Bangladesh's Sheikh Hasina, Chile's Michelle Bachelet, Tanzania's Jakaya Kikwete, Denmark's Halle Thornig Schmidt, France's Francoise Hollande and Mexico's Enrique Pena Nieto. And as time goes by these leaders are being joined by the likes of Cameron, Zuma and Dilma, old-timers who took a while to get their diaries together.  The combination of fresh faces and seasoned leaders hold promise for a new wave of climate leadership, a leadership that is shared and acted upon.

These leaders will need to deliver statements which emphasise the importance of 2015 and their collective responsibility to fulfil the 2°C obligation. Their challenge is to think long-term and spell out the vision of a 2°C world. Keeping warming to 2°C can’t be done in a short political cycle, but it does mean getting on track to zero carbon pollution and phasing in clean energy starting today. No country can single-handedly manage climate risk and in a bid to build trust amongst one another words alone won’t be enough. Success will manifest in the action announcements that contribute towards reducing emissions for 2015 and into the long-term.

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