Bloomberg: The European Union may have to scale back its goals to reduce global-warming emissions after a less- ambitious plan won initial approval in U.S. Congress. The 27-nation bloc has asked all industrialized countries to reduce greenhouse gases an average 30 percent over 30 years. The first U.S. legislation ever to cap emissions, which passed a committee vote yesterday, calls for a 5 percent cut by American industry in the period. The gap poses a potential conflict when global talks on a …