Agence France-Presse: Prime Minister Fredrik Reinfeldt of Sweden, which will assume the rotating EU presidency next month, called Tuesday for European nations to tax carbon emissions to reduce greenhouse gases. Sweden introduced such a tax on carbon dioxide as far back as 1991, deeming it an inexpensive way of helping the environment without resorting to costly new infrastructure and technology. The move has proved very effective, Reinfeldt told reporters during a trip to Brussels. Reinfeldt, …