In assembly, the principle impact relates to the use of glues and adhesives. The main issue associated with the use of adhesives is related to the solvent content of glue and the consequent emissions of VOCs, although other hazardous substances may also be present in certain glues. Therefore, in order to minimise the negative environmental impacts of certain glues, criteria shall be set to limit the content of VOCs in adhesives and the content of hazardous additives.