LOUISIANA — It wasn’t the wail of a siren or the buzz of an emergency phone alert that warned Tanya Richard a pipeline near her home was spewing poison gas. The first hint that something was wrong came from her cats, a motley collection of free-roaming felines that fled her property as the dense cloud […] The post ‘A stark warning’: Latest carbon dioxide leak raises concerns about safety, regulation appeared first on South Dakota Searchlight.