Bamboo flooring is an attractive alternative to hardwood flooring:

It comes in several shades or hues, and is available in several more darker colors. To darken bamboo, it must be heated with steam. Steamed bamboo can be almost as dark as walnut, or any shade in between.

Bamboo flooring does have environmentally-friendly aspects:

It is a grass, not a tree, so it matures much faster. Some bamboo flooring comes from natural groves, requiring almost no fertilizers or other chemical in the growth process. It contains fewer voc’s and utilizes far fewer toxins in its production than other types of flooring. It is certainly “greener” than carpeting.