ublic records show Ohio regulators log hundreds of incidents each year dealing with chemical releases related to the oil and gas industry. 

Such events raise critics’ concerns about plans to drill for oil and gas under state-owned parks and wildlife areas. While most problems happen at rigs and wellheads, which will be outside the parks, critics say airborne releases of methane or other chemicals would not be limited to property boundaries. And they fear that runoff could reach groundwater or surface water sources for state parks and nearby areas.

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