Сложить предложения. 1) of, kind, the, region, in, what, is, dangerous, pollution, most, your ? 2) source, is, the,of, what, the, pollution ? 3) cause,health, can, what, it, problems? 4) do, stop, people, what, pollution, to, can, the ?

1) What is the most dangerous kind of pollution in your region?
2) What is the source of the pollution ?
3) What health problemsit can cause ?
4) What can people do to stop the pollutioin ?