From left to right: German Chancellor Angela Merkel, Secretary-General Ban Ki-moon and U2 singer and activist Bono. Photo: Francyne Harrigan

From left to right: German Chancellor Angela Merkel, Secretary-General Ban Ki-moon, U2 singer and activist Bono, Sir Mark Moody-Stuart and Executive Director of OXFAM International Winnie Byanyima at the Private Sector Forum. Photo: Francyne Harrigan

Education First High Level event:  (from the left): Mrs. Ban, HE Peng Liyuan, First Lady of the People's Republic of China, President of the Republic of Korea Park Geun-hye, Director-General of Ä¢¹½ÊÓÆµESCO, Irina Bokova, and Nobel Peace Prize Laureate Malala Yusufzai.

Education First High Level event: (from the left): Mrs. Ban Soon-taek, First Lady of the People’s Republic of China Mrs. Peng Liyuan, President of the Republic of Korea Park Geun-hye, Director-General of Ä¢¹½ÊÓÆµESCO Irina Bokova, and Nobel Peace Prize Laureate Malala Yusufzai.

Mark Zuckerberg (centre), CEO of Facebook Inc., addresses the interactive dialogue of the Summit for the adoption of the post-2015 development agenda, ¡°Fostering sustainable economic growth, transformation and promoting sustainable consumption and protection¡±, held at Ä¢¹½ÊÓÆµ Headquarters. Ä¢¹½ÊÓÆµ Photo: Mark Garten

Mark Zuckerberg (centre), CEO of Facebook Inc., addresses the interactive dialogue of the Summit for the adoption of the post-2015 development agenda, ¡°Fostering sustainable economic growth, transformation and promoting sustainable consumption and protection¡±, held at Ä¢¹½ÊÓÆµ Headquarters. Ä¢¹½ÊÓÆµ Photo: Mark Garten

Ahmad Alhendawi, Secretary-General¡¯s Special Envoy on Youth, speaks during an event on ¡°Mobilizing Generation Zero Hunger¡±. The event was co-organized by the Permanent Mission of Ireland, the Office of the Envoy of the Secretary-General on Youth, the Food and Agriculture Organization of the United Nations (FAO), the International Fund for Agricultural Development (IFAD) and the World Food Programme (WFP). Ä¢¹½ÊÓÆµ Photo/Cia Pak

Ahmad Alhendawi, Secretary-General¡¯s Special Envoy on Youth, speaks during an event on ¡°Mobilizing Generation Zero Hunger¡±. The event was co-organized by the Permanent Mission of Ireland, the Office of the Envoy of the Secretary-General on Youth, the Food and Agriculture Organization of the United Nations (FAO), the International Fund for Agricultural Development (IFAD) and the World Food Programme (WFP). Ä¢¹½ÊÓÆµ Photo/Cia Pak

Renowned Chinese pianist Lang Lang takes a selfie on the twitter mirror to show his support for the Sustainable Development Goals.

Renowned Chinese pianist Lang Lang takes a selfie on the twitter mirror to show his support for the Sustainable Development Goals.

Kak¨¢, football player and World Food Programme Ambassador Against Hunger, speaks during an event on ¡°Mobilizing Generation Zero Hunger¡±. The event was co-organized by the Permanent Mission of Ireland, the Office of the Envoy of the Secretary-General on Youth, the Food and Agriculture Organization of the United Nations (FAO), the International Fund for Agricultural Development (IFAD) and the World Food Programme (WFP). Ä¢¹½ÊÓÆµ Photo/Cia Pal

Kak¨¢, football player and World Food Programme Ambassador Against Hunger, speaks during an event on ¡°Mobilizing Generation Zero Hunger¡±. The event was co-organized by the Permanent Mission of Ireland, the Office of the Envoy of the Secretary-General on Youth, the Food and Agriculture Organization of the United Nations (FAO), the International Fund for Agricultural Development (IFAD) and the World Food Programme (WFP). Ä¢¹½ÊÓÆµ Photo/Cia Pal

People at the Global Citizen Concert show their support for the Sustainable Development Goals.

People at the Global Citizen Concert show their support for the Sustainable Development Goals.