Associated Press: Beijing had its coldest morning in almost 40 years and its biggest snowfall since 1951. Britain has been suffering through its longest cold snap since 1981, and freezing weather recently gripped the Deep South, including Florida’s orange groves and beaches. Whatever happened to global warming? Such weather doesn’t seem to fit with warnings from scientists that the Earth is warming because of greenhouse gases. But experts say the cold snap doesn’t disprove global warming at all …