With regard to cells made of silicon, which are by far the most widely used on the Luxembourg market, current production techniques do not require the use of any substances that are harmful to the environment.
Thin-film cells use elements such as cadmium or tellurium. The quantities used for the production of related modules are, however, minimal, especially for cells composed of cadmium telluride, known as CdTe. CdTe has low toxicity and the environmental consequences are considered negligible compared to the impact that could be caused by other means of electricity generation.