All trees dead, defaced, broken, dangerous or diseased, or that part of a tree which constitutes a hazard, or that part of the roots of any tree or shrub which interferes with or causes the surface of the street, curb or sidewalk in public right of way to be upheaved or otherwise disturbed, or any tree or shrub that has an infestation of pests, which may spread or the continued existence thereof constitute a serious hazard, or any tree or shrub or part thereof, whether public or private which so overhang a public right of way or are growing thereon in such a manner as to obstruct or impair the free and full use of the right of way, or which constitute a sight hazard as defined in section 12.36.425 of this chapter are declared to be a public nuisance. (Ord. 3565, 2017)