The owner of any property in the city is required to remove or destroy all trees, plants, shrubs or vegetation, or parts thereof, which overhang any sidewalk or street or which are growing thereon in such manner as to obstruct or impair the free and full use of the sidewalk or street by the public; and is further required to remove or destroy all grass, weeds, shrubs, bushes, trees or vegetation growing or which has grown and died upon property owned or occupied by him and which constitute a fire hazard or a menace to public health, safety or welfare.