Abstract
The development of science, which has been observed in recent years, shows that engineering knowledge and activity are becoming more and more interdisciplinary. Up to the late 80-ties of the previous century, the experience and interest of engineers covered mainly hard sciences that directly followed their education. After this period, the engineering knowledge and solutions proposed in one discipline started to be applied successfully in other domains. This tendency can be seen especially in Biomedical Engineering, which development is based on achievements made in the rest of hard sciences, even if they seem to be as distant as Environmental Engineering.