Biobased resources are all resources containing non-fossil, organic carbon, recently (<100 years) derived from living plants, animals, algae, microorganisms or organic waste streams. These are summarized in the term "biomass". This section describes the formation of biomass through the process of photosynthesis. Biobased resources can be classified and characterized according to their origin (e.g. plant, animal) and the sector (agriculture, forestry or waste) in which they are produced. However, for the integration into specific biobased product chains, the most relevant classification of biomass is according to its major component, i.e. starch, sugar, lignocellulose, oil or protein.There are various options for tailoring biomass properties to user demands. This section considers breeding, green biotechnology and genetic engineering. Synthetic biology uses the tools of genetic engineering and biotechnology to construct completely new functional units or systems with desired properties. The bioeconomy also makes use of biological knowledge, described here as the combination of biological data and its interpretation, often by means of bioinformatics, and the understanding of naturally occurring mechanisms (bionics).