(AP) — Activists in about a dozen U.S. states are having a day of action to highlight concerns about potential environmental and health effects of hydraulic fracturing, or fracking, a high-pressure technique for extracting oil and gas from shale deposits.

The Youngstown, Ohio-based Frackfree America National Coalition organized Tuesday’s events, including rallies in a number of Ohio counties. Some Youngstown-area earthquakes have been tied to fracking or the deep-injection of fracking wastewater.

Elsewhere, planned actions included rallies, press conferences, full-page newspaper ads and film screenings. Activists were participating in Kansas, Michigan, New Hampshire, New Jersey, North Carolina, Oklahoma, Pennsylvania, Texas, Virginia and West Virginia.

Environmentalists

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