Many of us have heard of the Raspberry Pi in the past. It may sound like a food but is anything but. It is a great tool for folks who want to try exciting electronics projects. This infographic from WhoIsHostingThis shows you how to get started with it:
This is great since we don't have any outdoor hose hookups! How to Build a Rain Barrel. A dual barrel system that uses atmospheric pressure to equalize the water volume in both rain barrels. Use the water from your rain barrels to water your plants.
Build Your Own Vertical-Axis Wind Turbine On The Cheap - Didn't realize vertical wind turbines existed. The scale of this one and the fact that it supposedly doesn't require gale force winds to produce power makes it definitely worth looking into.
Solar Panel-In-a-Tube Generates Power and Hot Water At the Same Time Solar photovoltaic cells and solar thermal collectors both capture the sun's rays. The first one turns the light into electricity, while the other turns it into hot water for heating.