The present invention comprises a bio-polymer based solid for the sustained release of an active agent into the air consisting of: a) a primary starched—based polymer; b) a secondary polyether block amide polymer, and: c) a filler component. d) one or more active oils The active oils can be one or more fragrances so as to provide an air freshening composition, a flavor to create a certain aromatic environment or a repellant such as insect repellants for the elimination of mosquitoes and the like. Animal repellants may be incorporated to ward off unwanted pets and wildlife outside the home and attractants may also be utilized in the production of fishing lures and the like.