for years the waters in the town of parkersburg, west virginia held a dangerous secret, one that slowlye to light after decades of persistent digging by one determined lawyer. now his quest for justice explored in a new film that's drawing renewed focus on the everyday chemicals we may be exposed to. >> nothing but the truth, so help you god. >> i do. >> reporter: actor and activist mark ruffalo is waging a new battle on capitol hill. >> these chemicals don't respect political boundaries. >> reporter: he's sounding the alarm about so-called forever chemicals, manmade substances that don't break down in the environment. >> they are found in every one of you. >> reporter: his new movie "dark waters" exposes how toxic they can be and how common. >> du pont is knowingly poisoning 70,000 local residents for the last 40 years. >> who is paying for this failure to act? it's people like bucky bailey, who's here today. >> i was originally born with just one nostril. limited vision in my right eye. >> reporter: bucky bailey's mother worked in the du pont chemical plant in 1980 in parkersville, we

line from parkersburg, west virginia. good morning. go ahead.aller: the only thing i need to say is everyone in america should watch c-span today during these proceedings. empty their mind of all the news, everything that have heard juror as as a tour -- a hearing. then decide after the testimonies and decide from there on their own. not what they hear on the news, or everybody else, thank you. host: what are you hoping to learn? caller: i'm hoping to hear the truth. you hear all different things from the news, depending on what you listen to. did blackmail ukraine, then he needs to be impeached. crime. a host: that is deborah from west virginia. we will show you from gavel-to-gavel, no interruptions or commentary. you could expect that to start off at 10:00. .even cameras within the room not only will you see that on c-span but we are known as the wellfor other networks as with our camera setup. a lot of people put time and effort into that. to youg these hearings at 10:00 this morning. i've been hearing people talking about different things bo