Research has shown that excessive noise damages people's hearing. In fact many young people now suffer from deafness from regularly going to discos where the level of noise is so high that they have to shout to make themselves heard. Unfortunately, in spite of modern technology, noise is very much part of our modern world planes flying overhead, traffic thundering along busy roads, television, portable radios, all produce noise to which we have become so accustomed that we hardly notice it. In fact people going on country holidays have been known to complain that it is too quiet. They actually miss the noise they are used to in their daily lives. The problem is that noise, though it does not necessarily cause deafness, causes anxiety and this can in the long run prove harmful. However, the decision about more or less noise cannot be left to the scientists alone. It is up to us to decide what kind of world we want to live in. Noise is sure to lead to ______ in the long run according to the article.