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![A worker stands outside a concrete plant in Seo District, Incheon, on April 8. The plant has halted operations due to disruptions in the supply of raw materials as instability in sourcing continues due to the Iran war. Asphalt, a byproduct of crude oil refining, is affected by crude supply conditions. [YONHAP]](https://image.koreajoongangdaily.com/12514532.jpg?imageId=12514532&width=240&height=184&format=webp&format=jpg)