Britain's Prime Minister Theresa May says the UK will ratify the Paris climate change agreement by the end of the year as she gave her first address to the United Nations.
She used the appearance at the UN general assembly on Tuesday to stress the need for international action to tackle crises including war and mass migration.
The prime minister told the gathering in New York that the UK would be a "dependable partner" on the world stage.
She said: "Some of the threats that we face together today are familiar to those founding leaders: war, political instability, abuses of human rights and poverty.
"Others are new: global terrorism, climate change, and unprecedented mass movements of people.
"We gather here today because we know that such challenges do not respect the borders of our individual nations and that only by working together shall we overcome them."
Signalling her commitment on the Paris agreement she said the UK would "continue to play our part in the international effort against climate change".
