It's not too much of an exaggeration to say that the housing market is in the crapper. After its bubble burst, countless construction workers and home builders suddenly found themselves without work. When no one's buying homes, no one's building them, either. That is, unless you're green. Environmentally hip builders have been able to keep their job sheets filled and their employees on the books. Some of this admittedly is because there are so few qualified green builders relative to the overall industry, but the fact remains that demand for efficient buildings is going nowhere but up.