Robert Taylor, center, speaks at a St. John the Baptist Parish council meeting in 2017. He and the other members of the citizens' group around him wear T-shirts that reference the safety limit for the chemical chloroprene. Julie Dermansky hide caption
A sign posted on a roadside fence outside a Dow Chemicals plant in Freeport, Texas. The front-runner for governor, GOP Attorney General Greg Abbott, sparked controversy recently by suggesting citizens should simply go to nearby chemical and fertilizer plants and ask what's being stored there if they are worried about hazardous materials. Pat Sullivan/AP hide caption