Citing environmental concerns, an Arizona congressman filed a lawsuit Wednesday to block President Donald Trump’s proposed border wall.

The suit, filed by Rep. Raul Grijalva (D-Ariz.) and the Center for Biological Diversity, calls for an in-depth investigation into the wall’s potential impact on the environment.

“American environmental laws are some of the oldest and strongest in the world, and they should apply to the borderlands just as they do everywhere else,” Grijlava said in a statement.

“These laws exist to protect the health and well-being of our people, our wildlife, and the places they live.”

Such a review would probably take several years to complete, delaying indefinitely the fulfillment of one of Trump’s signature campaign promises.

“It will take a significant amount of time to thoroughly analyze [the impacts of the wall], and that’s the point,” said Randy Serraglio, a spokesman for the Center for Biological Diversity, as reported in The Guardian.

“What we learned about the border wall in the past 10 years is that it’s hugely expensive, it doesn’t work, and it does a tremendous amount of damage,” Serraglio said. “The people in the United States have the right to know what the damage is going to be, what it’s going to cost, and whether it’s going to be effective. Those are questions the Trump administration is not interested in answering.”

The lawsuit invokes the National Environmental Policy Act, which requires environmental review of major federal programs.

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