The hotter the weather, the more quickly the waste breaks down into ammonia to be taken up by plants.

VOA: special.2010.03.15

They found that over a period of six years, planting three rows of trees reduced total dust and ammonia by more than half.

VOA: special.2009.09.08

And there was a new fuel, a mixture of liquid ammonia and liquid oxygen.

VOA: special.2010.07.07

The trees capture dust, ammonia and odors in their leaves.

VOA: special.2009.09.08

They can also reduce the strong smell of ammonia gas.

VOA: special.2009.09.08

Discovery is delivering a new astronaut sleeping quarters, an ammonia tank and a gyroscope for the space station.

VOA: standard.2010.04.05

These can be sulfate,nitrate, ammonia,sodium chloride and if these are small particles they can be dangerous because if they are inhaled they can reach the lungs."

VOA: standard.2010.04.16