Seoul City spends W4.8b to reduce 0.8 ton of fine dust: "The city government spent 14.5 billion won ($13.4 million) to offer free public transportation during morning and evening rush hours on Jan. 15, 17 and 18 as part of emergency measures to combat high levels of fine dust.
This means it cost the city 4.8 billion won to prevent 800 kilograms of fine dust, or 6 million won per kilogram."
Corporate media ignores the fact that pollution exists because of subsidy to the auto system. For them, it is ok to spend tax dollars creating pollution, but "too expensive" to do anything that reduces it.