Linda Cook, Executive Director of Royal Dutch Shell speaks during a plenary session at the 19th World Petroleum Congress in Madrid on July 2, 2008. OPEC president OPEC Chakib Khelil said Tuesday the oil cartel was concerned about future demand, underlining that the cartel is in no mood to pump more crude to cool record prices. AFP PHOTO/PHILIPPE DESMAZES (Photo credit should read PHILIPPE DESMAZES/AFP via Getty Images)

By Deborah Jaremko