Reuters: German Chancellor Angela Merkel and British Prime Minister Gordon Brown accepted a Copenhagen climate deal on Saturday, but said they had wanted more. Merkel said she would support the compromise despite mixed feelings. "The decision has been very difficult for me. We have done one step, we have hoped for several more," she said. She added that the deal was not ambitious enough for the European Union to increase its commitment to cut carbon emissions by 30 percent by 2020 from …