Okay, just some side notes... Solar is still a fairly toxic process. Hydrogen is technically a fuel transport, not really a source unless you are using fossil generated fuel. Mainly it's a clean way to burn stored energy produced via other methods like Nuclear/Wind/Solar/Coal/NG/Gas plants.

When you get a house, look into using all the latest tech: http://blogs.zdnet.com/emergingtech/?p=239 With geothermal, instant hot water heaters, solar, and a combination of Low-E glass and good insulation, you might not pay anything for energy. In fact at some point, it's very likely that we will be producing our own energy on an ad hoc basis and only purchasing supplemental energy on the open market for both our home and our cars.

Right now the single biggest impact you can have is to cut your energy consumption. Then buy the highest mileage cars you can. Then get your home upgraded (or built) with the latest technology where you can pay for it over many years of useful life. Some of the latest gear has a really reasonable ROI. All of the above are voting with our dollars.
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Experience is a hard teacher because she gives the test first, the lesson afterwards.