Reuters: Russia’s opposition to new cuts in greenhouse gases means all of the world’s top four emitters are against making quick reductions, complicating plans for a new U.N. climate treaty by the end of 2009. "The positions … are just the tip of the iceberg of the problems ahead," said Bill Hare, a scientist at the Potsdam Institute for Climate Impact Research in Germany. The United States, China, Russia and India are the top emitters. The U.N. Climate Panel said last year …