COPENHAGEN  Perhaps the strangest sight at protests that turned violent here on Wednesday was a group of young men and women in fur coats and white bow ties who came bearing Champagne, fistfuls of dollar bills and grapes on a silver platter.

The group, which called itself Lobbyists for Profitable Climate Solutions, called on other protesters to stop their “global whining.” Corporations are already working hard enough to save the planet, they argued.

“We are very inspired by the International Chamber of Commerce,” said Morten Anderson, a 21-year-old from near Copenhagen who almost managed to keep a straight face while speaking for the group. “A great global market for trading carbon will solve matters related to the climate.”

The police said 260 people were arrested during the day of protests, in which demonstrators also tried to scale fences and descend on the conference center where international delegates are meeting on climate change. That brought the total detained since the meeting began Dec. 7 to 1,800.