The astronauts were three hundred twenty thousand kilometers from Earth with little oxygen, electricity and water.

VOA: special.2009.07.22

It carried oxygen,water, electricity and food for two men for two days on the moon's surface.

VOA: special.2009.07.22

Water is made of one oxygen atom and two hydrogen atoms.

VOA: special.2009.09.30

The hydrogen reacts with oxygen to produce electricity and water.

VOA: special.2009.09.07

Too much mulch can restrict oxygen and water flow.

VOA: special.2009.06.23

"If you have an imbalance, or literally too much nitrogen and too much phosphorous getting into those systems, you can essentially deplete the oxygen in that water.

VOA: standard.2010.08.04