Yorty prevailed, however, running as a populist. He railed against "a little ruling clique" of "downtown interests" and promised to revise the city charter, which had become unwieldy with the city's growth from a quiet West Coast town to the third largest metropolis in the country. He was a strong advocate of expanding the freeway network. Perhaps his most popular promise was to end residents' sorting of wet and dry garbage; dry garbage was typically burned in backyard incinerators which contributed to the city's notorious smog. There had been two independent collections independent: wet garbage (including food waste), and bottles and cans; dry combustible trash was burned in incinerators until Los Angeles County ordered an end to backyard trash burning in 1957, when Poulson was still mayor. After that, there were three collections: wet garbage, bottles and cans, and dry garbage.