Wall decals at first don't seem like they would be an environmentally product, but think about the fact that you don't have to use toxic paint or wallpaper glue to turn your walls into showcases. We have one similar to this in the small downstairs bathroom and it fills out the walls with cool design and color.

Organic Wall Decal The ultra-stylish Organic Wall Decal is printed on adhesive vinyl that can be easily applied to smooth surfaces and removed without leaving a trace. They’re fade and water resistant and include an applicator and instructions.