1.   Greenhouse gases are produced by a large range of natural and man-made processes throughout the woAd.

2.   It took no more time to produce the gas by the new method than it did using metals and acids.

3.   Later he considered a centralised system able to produce gas for a whole neighbourhood.

4.   These unexceptionable points, however, are merely the leaven that produce the gas to lighten the dough.

5.   Another example is the use of both urban and agricultural wastes to produce methane gas under controlled fermentation.

6.   As the apple ripens, it produces ethylene gas, which stimulates flower production.

7.   Automobile batteries produce hydrogen gas that accumulates in the battery case.

8.   Because of that, they produce more gases that contribute to global warming.

9.   BOC Group Plc, an industrial gas maker, is suing Medeva to block it from producing the gas.