|>>|| No. 4530
>There might be a limit in the rate it falls
Which is exactly the limiting factor. If you use water faster than it falls from the sky, you've got a drought. We can speed up the water cycle with desalination, but it's a lot more expensive than water conservation.
>The UK doesn't have a major water problem
Not yet, but there are some very real concerns about localised drought due to climate change. We've made big gains over recent years in reducing leakage, but we're approaching the point of diminishing returns. Thames Water already operate a desalination plant at Beckton; it's only used intermittently and processes brackish water, but it does indicate the relative insecurity of water supplies in the south east.