Thousands of protestors took to the streets of Copenhagen today as part of demonstrations around the world to demand a fair and binding new global deal to tackle climate change.
The protests marked the halfway point of UN climate talks in the Danish capital.
They included a mass rally outside the country's parliament and a march to the conference centre where negotiations on a new global warming deal are taking place.
While the main protest passed off peacefully, there were some incidents elsewhere in the city.
Up to 900 people were arrested as a number of groups clashed with riot police.
To mark The Global Day of Action on climate change, campaigners also staged a number of events around the world.
Former President and UN Human Rights Commissioner Mary Robinson was one of those who took part in this afternoon's march.
She was joined by a number of celebrities including Danish model Helena Christensen and English actress Helen Baxendale.
Ms Baxendale said thousands of people from all over the world were trying to encourage their leaders to take 'firm and fair action'.
Mrs Robinson also spoke at a candlelit vigil tonight, where she was accompanied by Archbishop Desmond Tutu.
Progress is reported to have been made on a number of issues but negotiations on greenhouse gas targets remain deadlocked.
Environment ministers started arriving in the Danish capital today for informal talks before world leaders join the summit late next week.
Initial reaction to the negotiating text submitted yesterday underscored the split between the wealthy countries and developing countries still struggling to overcome poverty.
