Hospital patients heal faster, require shorter stays and less painkillers if room windows face trees.
Here, the amount of plants and flowers allowed in a hospital room (mostly in more serious injuries-sicknesses cases) is fixed. That's because when they don't have light, plants absorb more oxygen than they produce, thus competing with patients for oxygen. But cactus are not restricted <img src="/ubbthreads/images/graemlins/tongue.gif" alt="" />
