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County ordinances in Iowa that restrict the placement of carbon dioxide pipelines are overruled by the authority of state and federal regulators and cannot be enforced, a federal appeals court decided Thursday.

The decision concerns ordinances adopted by Shelby and Story counties that, among other provisions, set minimum distances the pipelines must be laid from houses, schools, medical facilities and other sites with people and livestock.

Summit Carbon Solutions, which sued the two counties in 2022, wants to build a pipeline system that would span more than 2,500 miles and transport captured carbon dioxide from ethanol plants in five states — including Iowa — to North Dakota for underground

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