Abstract: The present disclosure identifies pathways and mechanisms to confer production of carbon-based products of interest such as ethanol, ethylene, chemicals, polymers, n-alkanes, isoprenoids, pharmaceutical products or intermediates thereof in photoautotrophic organisms such that these organisms efficiently convert carbon dioxide and light into carbon-based products of interest, and in particular the use of such organisms for the commercial production of ethanol, ethylene, chemicals, polymers, n-alkanes, isoprenoids, pharmaceutical products or intermediates thereof.