Environmental problems ignore international boundaries. Toxic wastes travel by water and air, sometimes displacing the effects of an environmental disaster entirely outside of its country of origin. It is now understood that to overcome the problems that face us international co-operation is required. This important work is designed to assist in that process, by helping to break down the language barriers that stand between countries. The manual, written in parallel English, German, French and Russian texts, provides the basic tools of communication in the specialized fields of environmental sciences between speakers of these languages. Each chapter has been revised in each separate language by specialists in the field to guarantee the authenticity of the information presented. The author is unique in his approach, presenting the key-words in context, as opposed to simple glossary entries, allowing the reader to fully understand the complex relations between the word and the concepts involved. A comprehensive index written in all four languages guides the reader through the text, providing references to the words as they are used in different disciplines.