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The techniques of mathematical modelling are more and more often used when solving ecological problems. The process of constructing economico-ecologic models is described as well as their most often met types and the main drawbacks of this type of technique are given. To these drawbacks belong, e.g. the practice of imposing solutions by model designers who see the priority of problems in another way...
The history of two German fortresses in Coblenz and Cologne is given. Although from both these objects pulled down after the World War I not much was saved, after the World War II works were started to save the remains of these fortresses. The fortresses were adapted for touristic and cultural aims. Today the management of both these objects can be an example of how to utilize the values of old fortresses.
Автор предлагает 2 методы, которые служат ликвидации последствий длительного загрязнения озёр. Первый метод состоит в отведении вод из дна озера и может быть применён в малых озёрах, которые отличаются особенными природными качествами. Второй метод состоит в частичном засыпании дна озера на всей его поверхности пеплом из электростанции. Статья, как пишет редакция, дискуссионна, потому что проблема...
The authors discuss in a complex manner the ecological consequences of the development of the copper industry in Poland in the years 1960—1988. During this period the air became greatly polluted in almost the whole area of the province of Legnica and beyond it as well as a considerable pollution of the surface waters occurred. The industry took over the possession of approx. 150 km² of the grounds...
Utilizing of restorative energy sources is not free from unfavourable consequences. The author of the article discusses them in detail referring to water energy, geothermic energy, wind, seas and oceans, and the so-called satellite power engineering. Taking as an example hydro-electric power stations the following adverse effects take place: inundation of agricultural grounds, necessity of displacing...
Hazards caused by high voltage power lines are discussed. In order to diminish the adverse effects in the areas surrounding these lines protective zones of the first and second degree are established. Dwelling in the zone of the first degree (the area with the electric field intensity exceeding 10 kV/m) is forbidden. On the other hand, in the zone of the second degree a temporary dwelling connected...
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