One of our favorite projects is rain water harvesting. This is a great way to help ensure you have a plentiful, clean water supply. Rain water is typically much cleaner than groundwater (fewer dissolved solids), and is softer (almost mineral free), so you use much less soap for cleaning and showering, and no stains or pipe calcification. Combined with solar water heating, you have a very low impact water solution. We are going back to Anguilla in the near future, which is an arid Caribbean Island, and there is little fresh water available, so rain water harvesting is a big part of everyone’s life. We install solar powered pumps, solar water heaters, and simple filtration systems. We have a discussion group to talk about these solutions, and a suite of eBooks that describe how to build these solutions at http://www.green-trust.org/products/.