The state of Montana can continue to kill bison that wander outside Yellowstone National Park, a federal appeals court ruled yesterday. The state is afraid that the bison will infect cattle with the disease brucellosis. More than 1,200 bison have been shot or shipped off to slaughter in the last three years. Enviros argue that there’s no evidence the disease can spread from buffalo to cattle and that the slaughter conflicts with the park’s designated function as a wildlife sanctuary.

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