Biobased and biodegradable plastic products based on annually renewable agricultural and biomass feedstocks can form the basis for a portfolio of sustainable products that are environmentally preferable, green alternatives to current materials based exclusively on petroleum feedstocks. The need for products to be fully biodegradable in a defined time frame in the selected disposal infrastructure as opposed to degradable or partially biodegradable will be reviewed. In this presentation, we review many new developments and rationale in designing and engineering biobased, and biodegradable plastics. Technology exemplars from our laboratory like starch biofoams, biobased, and biodegradable plastic products will be presented. Life Cycle Assessment (LCA's) of these biobased plastics show reduced environmental impact and energy use when compared to petroleum-based materials.