COPENHAGEN — Police are using tear gas and batons to disperse crowds of protesters trying to disrupt the U.N. climate talks in Copenhagen. Police spokesman Per Larsen says 230 protesters have been detained in the clashes outside the suburban conference center. Television pictures showed a man being pushed from the roof of a police van and stuck with a baton by an officer. Protesters said they wanted to take over the global conference — and turn it into a "people's assembly."