When {0} is smelted, the {2} will produce <b>{1}</b>. {1} can be dumped anywhere on the island by placing dumping designations (unless you disabled dumping in the <b>global dumping filter</b>). Trucks will always prioritize delivering {1} and other materials to where they are needed (e.g. for concrete production) before dumping. Dumping {1} is important, as your smelting industry will usually produce way more than you can use. Dumping it has no pollution effect.