. >> two of the chemicals found were tolulena and napolene.t will take months to know whether the chemicals come from helen eight and what a threat they are. arturo will see the process through. he believes his family and the town have a right to know. >> it's not named helena, new mexico. it's named mesquite and me mesquite. >> claims change. could this fine mist be one solution? we'll be back in a moment. [[voiceover]] every day, events sweep across our country. and with them, a storm of views. how can you fully understand the impact unless you've heard angles you hadn't considered? antonio mora brings you smart conversation that challenges the status quo with unexpected opinions and a fresh outlook. including yours. on inside story, we bring together unexpected voices closest to the story, invite hard-hitting debate and desenting views and always explore issues relevant to you. >> on the hot topic of global warming, scientists and policy makers gathered this week to finalize details of a key u.n. report often climate change. the big takeawa