Among habits which harm our organism first place is won by smoking. The leader position of this habit is caused by the fact that it has the broadest scope of application. In comparison with drug addiction, toxicomania and alcohol the influence of smoking on an organism is shown not so quickly that gives dependent on smoking a sense of security of a habit. However such carelessness can cost much because tobacco slowly, but surely poisons an organism and strikes bodies and the systems of bodies.

The condition of a stress is perceived by most of people as unambiguously negative. However experts are not so categorical in the estimates. They define a stress as the natural, natural and quite expected reaction to the various external irritants causing violations in the psychoemotional sphere. Now quite often refer economic instability in the world to the causes of a stress, an unstable financial position of people which generates uneasiness and concern for own future. And as it is impossible to avoid similar problems, influence of a stress on human health becomes constant. What it can lead to, it is useful to know to each modern person.

Drug addiction — the scourge of our time which is annually leading of up to hundreds of thousands of people to death. Statistics shows that the most part among accepting narcotic substances — youth and teenagers. What this is dangerous "plague of 21 centuries" and what influence of drugs on an organism by – subject of our article.

To any person familiarly painful feeling of tension and alarm which cannot be suppressed. The internal fear deprives of us forces, does helpless therefore so there is a wish to get rid of it.