Protestors set up a large aquarium in front of Berlin's famous Brandenburg Gate on Saturday to call world leaders to action at next week's Copenhagen climate summit.

In the aquarium, figures dressed as German President Angela Merkel, United States President Barack Obama, Chinese President Hu Jintao, and Senegalese President Abdoulaye Wade sat around a conference table gesturing as if they were having a meeting.

As the mock meeting took place, water in the aquarium slowly began to rise, eventually reaching the delegates' chins.

The aquarium in Berlin was set up by a group of climate activists called Klima-Allianz.

"The longer world leaders just talk and do nothing, the higher the water levels will rise," Juergen Maier, a leader of Klima-Allianz, told Reuters news agency.

Meanwhile, a demonstration in England on Saturday also called for concrete results to emerge from Copenhagen.

In London, around 20,000 people marched through England's capital city towards the Houses of Parliament.

The march was organized by a collection of environmental groups, including Oxfam and Greenpeace, under the name Stop Climate Chaos Coaltion.

mz/Reuters/AFP/AP

Editor: Darren Mara