On landscapes and cleared property, caring for Trees and Shrubs presents complicated issues you would not find in a natural enviroment. As they grow they are subject to thick inner and lower growth. This phenomena does not occur under a solid forest canopy, (which would be in the natural state). In our urban environment sunlight is plentiful due to the spaciousness, thus lush and un-natural growth occurs. Removing this un-natural growth lessens \'wind drag\' which will allow winds to rush through the canopy instead of acting as a fan and blowing the tree apart or down