Hi Hive account@marygreensmith. Great article! Water harvesting is going to be such an important part of our future. I work part time for a community gardening company Father Nature in Brixton, south London and we spend a lot of our time trying to educate householders (and local councils and businesses) about just that subject. We show people that if you can use biofriendly products at home or for roof building then the water that runs off your roof or out of your bath can be harvested in water butts and recycled around the garden and city green areas. My family spends 6 weeks wild camping every summer and we've really learnt to appreciate how precious a resource water is.