In Copenhagen, the US, Chinese and three other leaders reached an agreement late on Friday on fighting climate change but their deal caused widespread disappointment, falling far short of a legally binding treaty.
US President Barack Obama left the conference before all 193 nations could vote on the agreement, admitting that a legally binding treaty was still "some time" away.
The marathon talks proved to be too much for some delegates at the Bella Centre in the Danish capital – the venue of the summit.
Protesters holding pictures of world leaders cried "Shame!" on the outcome of the two weeks of talks, which had been billed as crucial to the planet's future.
Myriad details of the plans to combat climate change still have to be agreed between the industrialised and developing nations.
Countries like Bolivia – one of whose delegates is seen here – complained of having no input into the political deal forged by Mr Obama.
But on Saturday morning delegates passed a motion recognising the US-backed agreement.
UN Secretary General Ban Ki-moon hailed the deal as an "essential beginning", but said the agreement must be made legally binding next year.
As world leaders jet off home this weekend, it looks like another year of negotiations on climate change lies ahead.
What are these?