Carbon targets aren't anything new. States and local governments have set targets for reducing carbon pollution going back more than a decade.
Cool Way to Hot Water
Sample images from movie.
This video examines solar water heating. Solar water heating is one of the most cost effective ways to use solar energy. Though there are many different types of solar water-heating systems, the basic technology is very simple and illustrated in this video.
Runtime is 2 minutes 8 seconds.
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Video produced by the Arizona Department of Commerce Energy Office under a
grant from the Million Solar Roof program of the US Department of Energy.