"When the gas comes off the digester, it has not only methane in it it also has carbon dioxide And it has a trace of hydrogen sulfide."

VOA: standard.2010.02.23

One shows the remains of a dying star four thousand light years away which has thrown off a cloud of glowing hydrogen gas.

VOA: special.2009.09.30

Mister Zundt says a hydrogen bus will last an average of twenty years, while a diesel bus can be used for five to eight years.

VOA: special.2009.09.07

But not everyone sees the hydrogen fuel cell bus as the hope of the future.

VOA: special.2009.09.07

The city's urban transportation system recently launched the first of up to five hydrogen buses.

VOA: special.2009.09.07

The action of oil and natural gas created hydrogen sulfide in the limestone.

VOA: special.2009.12.07

Hydroxyl is the combination of one hydrogen atom and one oxygen atom.

VOA: special.2009.09.30

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

VOA: special.2009.09.30

They both worried about the possible use of a hydrogen bomb.

VOA: special.2009.06.14

Critics note the high cost of producing hydrogen.

VOA: special.2009.09.07

Payne said technicians found that seals on the hydrogen vent lines were out of alignment and they installed new ones to fix the leaks.

VOA: standard.2009.06.16