11.  The fuel cells combine hydrogen and oxygen to generate electrical power, producing water as a by-product.

12.  The hum produces water from the ambient humidity while purifying the air at the same time.

13.  The project, now on hold, could start producing recycled water for use in about five years.

14.  They are able to trap a great deal of dirt to produce clear water.

15.  But different systems aboard the station do not produce water, so hydrated food is more practical.

16.  In September, a separately organized company will begin producing iceberg water.

17.  More ultrasource units which could produce water drawn from lakes and ponds would be brought in, he said.

18.  On the use of ultrasource equipment, Sharif said it was a short-term solution and contributed little to solving the problem because of its limited capability to produce water.

19.  The ship has food for five or six days, but water will soon become a problem since the ship can only produce fresh water while it is moving.

20.  The system produced only water as a byproduct.