Nature's Touch: 5 Ways to Boost Your Health by Going Outside

Evaporate Depression

They sound like science fiction, but negative ions—particles that are plentiful near waterfalls, breaking waves, and river rapids—can act as natural antidepressants, according to Columbia University researchers. And an Indoor Air study found that after breathing negative ions for an hour, subjects' blood lactate levels dropped 33 percent, improving their energy levels.