Waste prevention should be seen as the main target of extended producer responsibility. Proportional and absolute targets for waste prevention can be found in the decisions made by the European Union: the EU Eco-efficiency Initiative to the United Nations suggests a target of 5 % increase in resource productivity as compared to current level. According to the EU’s 5th Environmental Action Programme the waste quantities have to be stabilised at EU average 1985 level. The EPR -decisions should include differentiated targets for waste prevention following the EU waste hierarchy. The producer should be made also economically responsible for reaching the targets. The most important measure to be taken to promote waste prevention is to change taxation so that it favours employment and disfavours the use of natural resources. In addition to economical instruments there are various informative and regulatory ways for promote those targets. The life cycle resource efficiency has by far the same consequences for construction as in electric and electronic equipment. In addition to save resources in the production phase it means enhancing the life of the product by producing durable, flexible, improveable, repairable and reusable products and by repairing, maintaining, improving and reusing them. The efficient use can be promoted by preparing multipurpose products or developing products and services. This way the number of users of a building or part of it or some electric and electronic equipment can be increased manifold. Waste prevention seems in many cases to bring along also significant economic savings. But it can also demand a radical change in attitudes of the producers and the users of the products: it requires a shift from just making products to taking care of them and from purchasing and owning to sharing, leasing and lending.