olexi pasyuk says the returnees are in danger. olexi pasyuk, bankwatch: it is also a big change for the people and big risk to move somewhere and maybe to get even worse day-to-day condition which you see. it is very different from living in the radiation impact which you don't see. there also might be some spots where it's actually clean, so maybe they would measure their house and it's ok. but the question is on every day's life. you are still being impacted because you go for the wood, you burn it, and you increase concentration of radioactive materials. reporter: a new sarcophagus made of steel and concrete is being built next to the reactor to prevent a second disaster. the old concrete protective casing has started to decay after 30 years. next year, the 100-meter high colossus will be placed over the old casing. the mammoth project has cost more than two billion euros. but the new sarcophagus will do nothing to alter the existing radioactive contamination. and not only in the dead zone itself. radioactive material from here