[Ecology and health].

The World Health Organization (WHO) has proclaimed 1990 as the year of human environment protection. A tight bond between ecology as a science, and preventive medicine has been observed. The paper presents the basic facts about ground, water and air pollution, as well as the effects of ecological disorders on human health. Noted are the basic pointers for the improvement of the conditions in our environment and the role that society and the individual, especially a physician has to carry. Everybody should act accordingly with the proclaimed slogan: Think global--Act local.