The diplomatic heavyweight, who oversaw UN climate and sustainable development deals, will join Seoul-based organisation as its chair and president
UN encourages countries to ratify Paris deal, as US weather agency NOAA reports June heat shattered global records
NEWS: WWF conservation and science expert will advise UN secretary general in approach to Paris talks
NEWS: UN secretary general sees evidence countries are working better together thanks to leaders summit he hosted in September
COMMENT: A letter from a schoolgirl on the sinking Seychelles to the UN secretary general Ban Ki-moon
NEWS: Political landscape is different from disastrous attempt to sign climate deal in 2009, says UN secretary general
NEWS: New study says 15 countries could hold key to ensuring world avoids dangerous levels of warming
NEWS: Climate vulnerable nations need to take leadership role or face severe impacts says UN chief
NEWS: UN report says climate, poverty and health targets will require huge cash injection from private sector to succeed
NEWS: Australian prime minister says he will not be among world leaders attending climate summit in New York
NEWS: UN Secretary General hails Chinese efforts to combat climate change during trip to Shanghai
ANALYSIS: World leaders will gather in New York in September for a much hyped Climate Summit. Are they ready?
NEWS: World Bank and Al Gore call for ‘polluter pays’ principle to be implemented across global economy
NEWS: Secretary General’s Earth Day message calls on people to “encourage” heads of state ahead of UN summit in September
NEWS: Crises in Syria and Ukraine have distracted world leaders from the urgency of climate change, says UN Secretary General
NEWS: High-level meetings at the EU see world’s three largest emitters agree to strengthen discussions on 2015 Paris treaty
NEWS: Speaking during Greenland visit, UN Secretary General says he wants to work closely with world leaders on climate issue
UN Secretary General calls for renewed efforts to cut greenhouse gases on the twentieth anniversary of the UN’s climate body
UN Secretary General hails the experience and leadership of newly appointed Special Envoy for Cities and Climate Change
European governments can “pressurise” heads of states into climate action says Connie Hedegaard