The nations of the world gathered on Monday in Paris to reach a new and universal climate change agreement, in the knowledge that they have already delivered an almost universal set of national responses to meet the long-term climate challenge before the conference even begins.

Over 150 heads of state and government arrived at the conference venue on Monday to give their public support, the largest group of leaders ever to attend a UN event in a single day.

Speaking at the opening ceremony, which was webcast live around the world, UNFCCC Executive Secretary Christiana Figueres said that the eyes of millions of people around the world were on the governments meeting in Paris, not just figuratively but literally.

She said: “You have the opportunity, in fact the responsibility, to finalise an agreement that enables the achievement of national climate change goals, which delivers the necessary support for the developing world and that catalyses continuously increasing ambition and action by all.”

Figueres said that the past year had been a turning point and that after many years of hard work, the world was finally seeing that the direction towards a low-carbon, resilient future was irreversible.

On the eve of the COP21 conference, 184 countries covering around 95 per cent of global greenhouse gas emissions had delivered their national climate action plans to the UN Framework Convention on Climate Change (UNFCCC).

During the UN Climate Change Conference in Paris the governments of France and Peru, along with the UN, are organising a series of high-level events to demonstrate that the transition to low carbon and resilience is under way.

Throughout the eight days of the LPAA, inspirational new commitments will be announced, in action areas, ranging from forests and agriculture to clean energy and private finance for climate action.