In doing so, they found new uses for the stalks of wild grasses; these included fuel for lighting fires, and the temper that transformed mud and clay from so much friable matter into a vital tectonic resource, used to build houses, ovens, storage bins and other fixed structures. Straw could also be used to make baskets, clothing, matting and thatch. As people intensified the harvesting of wild grasses for straw (either by sickle or simply uprooting), they also produced one of the key conditions for some
