The purposes of this Part are as follows and they shall be liberally construed to promote and advance the general welfare of the City:
A. To guide and regulate the orderly growth and development of vegetation on or near public areas in accordance with the Shade Tree Map and with long-term objectives, principles and standards deemed beneficial to the interest and welfare of the people of the City.
B. To protect the character and the social and economic value of both private and public property.
C. To preserve and enhance the visual character and natural beauty of the City.
D. To restore, insofar as is possible, a healthy natural environment, including but not limited to photosynthesis, underground water stability, surface runoff stability, the reduction of noise, the filtration of pollutants, such as ozone, sulfur dioxide particulate matter, etc., and the propagation of animal life.