Well.. it isn't rocket science when you realize that most rain water runs off the roof and into stormwater drains and much will go onto the land. Britain has a huge population and the demands on resources are very high. To a large degree the world has become a "throwaway society". Few things are meant to last which means they are thrown away in some manner and replaced thereby keeping people in employment manufacturing replacements. I guess a similar thinking is applied when it comes to a precious resource such as water. "There is plenty more in the tap." Am all for rainwater though am used to it coming from a rural environment which, theoretically has less acid rain etc. It certainly tastes different when you make tea/coffee and you don't see the oil slick that you sometimes get with town supplies via the tap. We didn't have chemicals added to it to make it potable, in fact the only filtering was a gauze filter for solid matter and it wasn't back in the dark ages it was about 8 years ago that I lived on a farm. However, even if rainwater here was used mostly for watering the garden and washing purposes then much in the way of savings on the tap supplies would be made.
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