Maine's Acadia National Park is one of the country's most popular parks; around 4 million people visit each year. Newcomers arriving this fall may not notice any changes. But recently, educational signs containing information on climate change, ecology and Native American history have been quietly removed.

Signs had been located in two of Acadia's most well-trod areas: six on the summit of Cadillac Mountain, and four in the Great Meadow.

The informational blurbs had asked hikers to help protect the fragile ecosystem by staying on trails and not picking berries, detailed how rising seas and intense storms due to climate change impact the park, and encouraged visitors to help avoid emissions by using the park's Island Explorer bus. Others explained the cultural and spiritual significance o

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