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What was in the past a reasonable need for light and the feeling of security in the dark has been brought, in Europe, to an extreme, which was several decades ago unimaginable. Enormous consequences of the light pollution have become apparent. By our way of using light we blind people on roads, illuminate their bedrooms and disturb animals. Many nocturnal animals are dying out because of the inappropriate outdoor lighting. There are more and more researches on the increase in the number of people suffering from cancer caused by light at night. The stars disappear in the night sky above Europe: once dark skies are turning into white, light polluted cover. Most city dwellers cannot see the Milky Way any more and lose contact with the source of their existence – space. The residents of Europe are, instead of increasing their standard of living, becoming the slaves and victims of their own consumerism. Light, which used to be a much desired commodity, has been turned into its opposite. The dark side of light has become apparent. This requires the European Union to act now! The 7th European Symposium for Protection of the Night Sky will inform participants about many problems, the most recent researches, as well as possible solutions. The latter involve political power, and therefore we have invited the most important representatives in politics. Light pollution contributes a great deal to global warming. This is another reason to stop it. Light pollution requires taking measures just as global warming does. Clear and efficient action of the European Union is required, here and now!