Under § 160A-185, cities have the authority to pass ordinances that regulate or prohibit the emission of pollutants that “tend to pollute or contaminate the land, water, or air.” This section also gives cities the power to enact ordinances to regulate the illegal disposal of solid waste and to provide for enforcement of such ordinances by civil penalties. Any ordinance passed under this section must be “consistent with and supplementary to State and federal laws and regulations.”