No person shall, upon any premises owned or occupied by him within the limits of the city, conduct or carry on any trade, business, or occupation, or keep, maintain, or permit any building or structure, or other matter, thing, or course of conduct which shall be a public nuisance, or which shall endanger the public health or materially interfere with the public comfort or convenience.
('58 Code, § 31.33) Penalty, see § 10.99