41.   Most Sarajevans never used gas before the war, relying mainly on electricity for heating and cooking.

42.   Once there, astronauts would use gasses in the Martian atmosphere to power a rover vehicle, which they would use to explore the planet, Zubrin said.

43.   On top of that, this has been the coldest winter in years, so people are using more gas to keep warm.

44.   Parking is easier, insurance is cheaper and they use less gas.

45.   Petronas has agreed to start paying for gas from the joint development area next July whether it can use the gas or not.

46.   Plasma displays use ionized gases that are excited by an electric voltage and create light for the image.

47.   Pemex wants to use the gas to increase the output of its Cantarell oil field, located in the Gulf of Mexico off the coast of Campeche State.

48.   Recent studies have shown that white blood cells also use the gas to kill infectious invaders, raising hopes for new treatments for cancer.

49.   Russia demonstrated its willingness to use gas for political leverage last winter.

50.   Saddam Hussein may have used the gas during the Gulf War.