Poly-3-hydroxybutyrate (PHB) and other related polyhydroxyalkanoates (PHAs) are biodegradable thermoplastic polyesters stored in numerous bacteria as carbon and energy reserves and now have been regarded as ideal alternatives to traditional petroleum-derived plastics, which cause severe environmental and waste management problems. Because PHB/PHAs production by bacteria fermentation is prohibitively expensive, great attention has been focused on the synthesis of PHB in plants using CO2 for carbon...