Claiming euthanasia by gas chamber to be inhumane, a group opposing the use of gas chambers in Wyoming wants the city to move away from euthanizing animals at its animal shelter in this manner.

A spokesperson for Wyoming Against Gas Chambers, Madhu Anderson, spoke to the Green River City Council Tuesday evening to highlight the practice. Anderson said the practice is not only inhumane and cruel, but also causes physical and psychological stress on animal shelter workers and says the practice is also cost ineffective.

Wyoming is one of four U.S. states that still allows for gas chambers for...