Heading out for an adventure at one of America's beautiful national parks? Leave your electronic cigarette in the car.

The National Park Service today banned the use of "electronic smoking devices," including e-cigarettes, in all places where tobacco smoking is prohibited in America's 408 national parks. The new policy is effective immediately.

"Protecting the health and safety of our visitors and employees is one of the most critical duties of the National Park Service," Director Jonathan B. Jarvis said in a statement. "We are therefore extending the restrictions currently in place protecting visitors and employees from exposure to tobacco smoke to include exposure to vapor from electronic smoking devices."

Under the new policy, e-cigarettes and other so-called "electronic nicotine delivery systems" (ENDS) are banned within all facilities and vehicles that are government-owned and leased and within all national park concessions facilities. So, when you see a no smoking sign in a national park, that means no vaping either.

In a statement, the National Park Service said that vapor exhaled from e-cigarettes contains about one-tenth the nicotine found in second-hand smoke.

"Nicotine is highly addictive, toxic to developing fetuses, and impairs fetal brain and lung development," the agency said. "Recent public health studies suggest that ENDS aerosols can also contain heavy metals, ultrafine particulates, and cancer-causing agents."

Meanwhile, e-cigs aren't the only tech devices on the national park naughty list. The National Park Service also recently banned the use of personal drones throughout Yosemite National Park because of their possible interference with the animals there.

Last year, U.S. Forest Service officials in Lake Tahoe were forced to warn hikers not to take selfies with bears.

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