21.   California-based Arco, which hopes to expand its oil reserves outside the U.S., said it is considering how to respond.

22.   Campeche, located on the Gulf of Mexico, is rich in oil reserves.

23.   Chechnya also holds oil reserves and is crossed by key regional oil pipelines, railroads and roads.

24.   Clinton said he has not ruled out turning to the oil reserves.

25.   Clinton urged Congress to pass legislation that would authorize a way to tap into the new heating oil reserve.

26.   Conoco, for example, was recently prevented from developing oil reserves off Iran.

27.   Considering the estimates for proven oil reserves and the need to prevent global warming, we cannot be completely free of dependence upon nuclear energy.

28.   Echoes from these pulses are bounced off of sub-seafloor rock layers and picked up by the hydrophones, which transmit information about potential oil reserves to computers for interpretation.

29.   Earlier this week the White House issued an executive order banning deals by U.S. companies to help Iran develop its oil reserves.

30.   Exxon has been seeking to expand its exposure to big oil reserves in the former Soviet Union, particularly around the Caspian Sea.