Every day, firefighters are asked to enter burning buildings while knowing the toxins they're exposed to inside could eventually kill them. West Bend Fire Department Battalion Chief Jeff Gustafson said today's couches and mattresses contain "really bad things in them that weren't around 20 years ago." He said many of those synthetic materials produce cancerous fumes when they burn. But while Gustafson and his fellow firefighters can't control what furniture is present in a burning building, they can control safety conditions inside West Bend's three firehouses. The fire apparatus West Bend first responders use burn diesel fuel.