Sierra Club members are not happy about a Russell Pearce-backed plan to seek donations to build more fencing along the border. According to the organization, new walls would cause flooding and put native species at risk.

Per a press release:

With 307 of 375 border miles already occupied by barriers and walls, Arizona is subjected to more border walls than any other state. Walls have caused massive flooding at Organ Pipe Cactus National Monument and block wildlife at important refuges such as the San Pedro Riparian National Conservation Area and the Buenos Aires National Wildlife Refuge.

A recent study of amphibian, reptile, and some mammal species along the border found that new barriers would increase the number of already threatened species whose survival would be put further at risk.

On a non-environmental vein, Sierra Club higher-ups said the planned fencing would be expensive and ineffective, adding that there are more important issues for the legislature to focus on.