We will look in more detail at the subprime mortgage crisis in the USA, credit crunch (financial sector), interest rates movements, unemployment, and growth rates. Furthermore we will discuss decoupling argument. In order to answer and analyse our main question we will refer to the economic theory. I think firstly we need to object that all talks about world recession started after multiple debates about USA recession. What really our main question sound is: If USA will go to recession, what impact it will have on the world economy?