It’s one of those things many of us know by feel, but not necessarily through scientific evidence. We just feel better when we spend time exposed to nature.
But many environmental psychologists (they study the psychological effects of natural and built environments on humans) have shown empirically that spending time in nature has real psychological benefits. For example, if you decide to take a walk, forget the treadmill. Do it on a nature trail instead, and a better mood and greater viability, less frustration and lower mental distress may be your rewards.