Нужно 5 вопросов на тему nuclear pollution! заранее

1. Why is protection of the environment in Russia paid much attention to?
2. What happened on April 26, 1986 in Chernobyl?
3. What environment problems are there in Russia?
4. Why do people get worried much about the state of the environment?
5. What is one of the most radioactive seas in the world?