Pro-environmental education and the effectiveness of its methods are a necessity, decisive for preserving natural resources for successive generations. Educating proper attitudes towards the surrounding nature must be based on sound knowledge gained, supported by observation, experience and experiment. Teaching conducted at all levels environmental science should be based not on boxed knowledge, but on causal thinking skills. Establishing hypotheses and their verification, as well as the variety of methods of understanding the laws of nature, will influence the effective prevention of environmental degradation in the 21st century.