ASTANA, November 28. /TASS/. The simultaneous use of several Oreshnik missiles is comparable in strength to a nuclear strike, but it does not contaminate the environment, Russian President Vladimir Putin said, answering journalists' questions. "If you use several such systems in one strike at once - two, three, or four systems - it will be comparable in strength to a nuclear strike. But it is not nuclear because it is a) highly accurate and b) it is not equipped with a nuclear explosive device. It does not contaminate the environment. But it will be comparable in strength," Putin said.