James Hardie(R) siding is a sustainable and marvelous substitute for wood. It's available pre-colored and the finish truly looks like high-grade wood siding. I've used this product line for years, and have been delighted with the results. It's the only product I will consider substituting for wood, and in many climates it's significantly preferable because of its stability.
Sarah SusankaOnce you make the unequivocal internal commitment to do something - when you absolutely know this is the time and the place to act - the world around you will shift in all sorts of apparently miraculous ways to make it happen.
Sarah Susanka