Anthropogenic impacts on the climate

The paper briefly describes the global climate system, the constituents of the earth atmosphere, the natural greenhouse effect and its enhancement through man-made impacts, particularly the increasing CO2 emissions. The establishment of climate models and their information value are explained, referring e.g. to the signs given by experimental data, indicating a global warming. The author stresses the need for international, concerted action to avoid emissions contributing to global warming. (orig.)