Nitrogen gas is banned in Louisiana to euthanize dogs. The state plans to use it to kill a death row inmate next month

The use of nitrogen gas is considered too barbaric and inhumane for euthanizing dogs and cats, according to veterinarians, and has been banned in all but two states.

But, on March 18, Louisiana – after a decade-and-a-half death penalty moratorium – is set to execute a person this way.