21.   Water expands when it freezes, an effect that can crack a sidewalk when water collects in tiny holes in the concrete.

22.   Water has collected on top of the bulge, deteriorating the mortar prematurely.

23.   Water collects, and it is an ice hazard in winter.

24.   Where water has collected from the rain, methane gas bubbles up to the surface and pops.

25.   Being stagnant like that, the water only collects disease.

26.   In one program, workers were sent into neighborhoods to put insecticide into potted plants, drains and elsewhere where stagnant water collects and mosquitos breed.

27.   In rain-fed rice systems, water loss will have to be reduced and runoff water collected in reservoirs and applied to crops during droughts, it said.

28.   Water collected on the greens on each of the three courses, making them unplayable.

29.   When play was interrupted six months ago, water had collected on the greens and shots were disappearing into the muck.

30.   Water collects in tires, providing a good breeding site.