Treehugger has a great feature on building a geodesic dome solar greenhouse so you can grow your own food. The slideshow is really amazing! Collin Dunn at Treehugger writes:
What do you do when you want to grow your own food, but live more than a mile above sea level in Colorado? That’s the question my dad wanted to answer when he started this project about a year ago: Living at 7,750 feet above sea level, with a summer growing season of about 80 days between killing freezes, how can you grow your own food? His answer: A geodesic dome solar greenhouse.