European shares fell at the open on Wednesday, mirroring a slump in copper and oil prices after the World Bank cut its global growth forecast for this year, Reuters reported. The FTSEurofirst 300 index of pan-European shares was down 1 percent at 1,362 points at 0802 GMT, with oil major Total and commodity firm Glencore the biggest drag on the index as they fell 2.9 percent and 6.5 percent, respectively.