Certain materials, products and methods are hazardous to soil, air, ground, and surface water as well as the health of humans, flora, and fauna. The use of materials, products, and methods which endanger the soil, air, ground, and surface water due to their chemical composition or physical characteristics must be reduced or avoided, or these must be substituted in order to reduce risks to humans and to the local environment to a minimum. This applies particularly to those materials, products, and methods which cause short, medium and/or long-term damage to risks to soil, air, ground, and surface water as well as the health of humans, flora, and fauna. This includes a consideration of their entire life cycle including manufacture and processing on the building site, use in the building, and their end-of-life including demolition, recycling, and disposal. Risks to the local environment are considered in relation to materials and products used. At present, there are no established methods to capture and evaluate toxicity to humans and the environment.