The roots help a tree to stay upright in strong winds. Anna: There are lots of different types of plants, and even though they're all different, there are lots of parts that are the same.

The Pennsylvania Horticultural Society recently did a study that found July temperatures were more than 10 degrees hotter in treeless parts of Philadelphia compared to tree-shaded ones.

Vital parts of their ecosystems ... or forest bathing—can promote health and happiness. From an ancient tree standing on holy ground in France for almost a thousand years to the canopy of ...