In this chapter, I will illustrate how these tendencies can be, or are being, expressed by looking at the potential form and content of green production. While this distinction between form and content can be useful, one of the main lessons to be learned is that the form and content of postindustrial development cannot be separatedin the same way that decentralization, dematerialization and detoxification require each other to be fully implemented. Minimizing resource use, for example, requires a circular looped economy, well-adapted to local conditions, that circulates materials benign enough to be safely used for multiple purposes and eventually returned to nature as compost. The task of minimizing the use and dangers of toxic materials is, conversely, greatly aided by reducing the overall volume of materials flow in the economy. And all three processesalong with the form and content of the economyare all accelerated by the value revolution that puts services (to meet human and environmental need) rather than goods at the centre of economic development. The following sections will attempt to survey the basic principles of green production, as well as some special issues of green production with particular relevance for building materials today: e.g. indoor air quality in buildings, the role of plastics, of concrete and of engineered materials. Many important issues relating to serviceproduction and extended producer responsibility (EPR) will have to be left to Chapter VI on regulation. Some increasingly important forms of green productionthat of natural materials like strawbale and rammed earthdeserve special treatment in a chapter of their own (V). By the same token, many of the specific expressions of production in loops will be discussed more concretely in the next chapter (IV) on recycling, reuse and deconstruction.