The Trump administration has reauthorized the use of highly toxic cyanide bombs to kill wildlife that ranchers and farmers want eliminated.

The controversial spring-loaded traps, called M-44s, are filled with sodium cyanide and are used by the Wildlife Services division of the U.S. Department of Agriculture to kill animals such as foxes, bears, coyotes, wolves, mountain lions and birds at the behest of private farmers and ranchers.

Critics say the toxins can forever contaminate the environment, kill a far wider population of unintended victims, including pets, and harm humans.

Cyanide traps cant be used safely by anyone, anywhere , said Collette Adkins, carnivore conservation director at the Center for Biological Diversity environmental organization, which has long battled the traps. These deadly devices have caused too much harm to remain in use. We need a permanent nationwide ban to protect people, pets and imperiled wildlife from this poison.

Two years ago, one of the death traps was triggered in Pocatello, Idaho, as 14-year-old Canyon Mansfield was walking his dog, Casey . The dog died a violent death in front of Canyon, and the teen was rushed to a hospital, where he eventually recovered from exposure to the poison in the trap set by federal workers. His parents are suing Wildlife Services over his poisoning.