2015 United Nations Climate Change Conference
COP21 opens in Paris with an unprecedented leaders’ gathering
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Original prompt & settings (JSON) ↗Before anyone discussed planetary warming, more than 150 heads of state and government stood for a minute of silence for the people killed in the Paris attacks.
Opening day at Le Bourget
COP21 formally opened at Le Bourget, outside central Paris, on 30 November 2015. France immediately convened a Leaders Event for heads of state and government, presided over by President François Hollande.
More than 150 heads of state and government attended on opening day and delivered statements intended to give political impetus to the negotiations.
The conference observed a minute of silence for the victims of the recent Paris terrorist attacks before the leaders' speeches began.
Leaders first, deliberately
France had invited national leaders for the opening rather than a closing segment, so that they could hand negotiators an early political mandate.
Hollande, UN Secretary-General Ban Ki-moon and COP21 president Laurent Fabius addressed the event; UN General Assembly president Mogens Lykketoft chaired the end of the session.
More than 180 national climate action plans had been submitted before the conference opened.
Nothing was agreed that day
The Paris Agreement was not concluded on 30 November. Leaders left the detailed bargaining to negotiators, who worked nearly two more weeks; the agreement was adopted on 12 December.
Official records distinguish the scheduled dates, 30 November to 11 December, from the formal proceedings report, which runs through 13 December because the work went into overtime.
Describing the resulting nationally determined contributions as simply voluntary misses their hybrid character: countries choose their own targets, but the treaty requires parties to prepare, communicate and maintain successive NDCs.
Sources
Researched 24 Aug 2026 6 sources not yet audited
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What the sources leave uncertain
- Official materials distinguish scheduled dates from actual proceedings: the event was scheduled for November 30–December 11, the Paris Agreement was adopted December 12, and the formal conference report records the session as lasting through December 13 because work ran overtime.