To dream of lush green trees symbolizes new beginnings, development, and desires. It is also indicative of your uniqueness and maturity.
To dream that you are climbing a tree signifies that you will accomplish your professional goals and become a member of the higher echelon of society. The degree of difficulty that you experienced when climbing the tree is commensurate with the speed of achieving these goals.
To dream that you cut down a tree signifies that you are foolishly pursuing things that are a waste of your resources.
To see a falling tree in your dream means that you are not on the correct path in terms of going after your dream.