Welding processes and allied techniques (thermal spraying), by their nature are generating issues in terms of environment protection. The European Community has constant preoccupations in approaching these issues. The documents of the International Institute of Welding (IIS/IIW), and also, the European Welding Federation (EWF) have also such preoccupations. Synthesizing these concerns, the mode of intervention in combating undesirable aspects, acting in the context of the Sustainable Development, and numerous case studies are punctually presented.