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Violence Among Teenagers
Today teenagers are violent more than in the last generation. In the last few years the violence spread all over the country. In these days there are some external features that we can recognize violent people. Teachers, parents and teenagers report that violence increases every day. 


Alcohol today is more than just a problem among adults, but it has become a problem among teens. During the past ten years we had witnessed a steady decline in the number of alcohol-related motor vehicle deaths in the youth population, but there is a rise also in alcohol consumption overall. Alcohol is a main reason for violence whether it is growing up with alcohol users and abusers or the youth using the alcohol substance themselves. High school students who drink alcohol or use illegal drugs, including anabolic steroids, are more than twice as likely to carry a weapon or get into a physical fight than teenagers who deny drug use, according to a study in the August issue of the AMA's Archives of Pediatrics and Adolescent Medicine.
 The situation is dangerous. We must fight with this problem and involve teenagers into sport and other useful activities

Firstly, it is a war. Due to the proliferation of nuclear weapons on the Earth, which are able to destroy a life on the planet, the problem of war and peace has become global.
Secondly, it is the global warming as well as the environmental pollution. Every day the climate of the planet is changing more and more, reserves of fresh water are depleted, the environment is being polluted. All this is the result of human's activities, and if we continue to do this, the death of humanity within a few generations is inevitable.
Poverty, famine and homelessness are the causes of death for many years. To date, the number of people suffering from hunger and malnutrition has reached 1 billion people. It creates a serious threat to the international security.
The last thing I would like to say is about endangered species of animals and plants. Their habitats are being destroyed. This is due to global warming, logging, fire, mining. To sum up, it is necessary to make conclusions about the global problems of extinction of organisms.