If you travel by bus in Sao Paulo,Brazil these days your vehicle may be powered by hydrogen fuel cells.

VOA: special.2009.09.07

It contains forms of hydrogen and oxygen that can mark, or label, these elements within body water.

VOA: special.2011.07.27

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

The bus uses a hybrid system that combines the hydrogen fuel cells with high power batteries.

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

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

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

He regretted that work was being done to develop the hydrogen bomb.

VOA: special.2009.06.14

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

VOA: special.2009.09.30

The project hopes to export hydrogen fuel cell buses in the future.

VOA: special.2009.09.07

The hydrogen sulfide reacted with oxygen in rainwater moving through the rock.

VOA: special.2011.04.11

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