http://news.nationalgeographic.com/n...oplankton.html supply about 70% of the earth’s oxygen half the oxygen in the atmosphere comes from the ocean Phytoplankton half of the world’s oxygen produce half the planet’s oxygen convert that light into chemical energy half of the world’s oxygen every other breath you take half of the world’s oxygen half of the world’s oxygen half of the world’s oxygen half of the world’s oxygen produce half the planet’s oxygen half every other breath you take large amount of the oxygen half of the world’s oxygen http://news.nationalgeographic.com/n...oplankton.html half of the world’s oxygen half of the world’s oxygen half of the world’s oxygen half of the world’s oxygen half of the world's oxygen half of the world’s oxygen half of the world’s oxygen half of the world’s oxygen Ocean plants produce half of the world’s oxygen large amount of the oxygen half of the world’s oxygen half of our planet’s oxygen half of the world’s oxygen http://news.nationalgeographic.com/n...oplankton.html half of the world’s oxygen half of the world’s oxygen Half the world's oxygen half of our planet’s oxygen news.nationalgeographic.com... oceans get too little credit for their oxygen production moitiÃ© de l'oxygÃ¨ne half of the world’s oxygen National Geographic: Phytoplankton Source of Half Earths Oxygen Gets Little Credit half of the world’s oxygen http://news.nationalgeographic.com/n...oplankton.html Half the world's oxygen half of the world’s oxygen produce 40-50% of the world’s atmospheric oxygen creating half the world's oxygen Source of Half Earth's Oxygen Gets Little Credit half half of the world’s oxygen half of the world’s oxygen half the world's oxygen half of the world’s oxygen half every other breath you take half half of the world’s oxygen really??? Half the world's oxygen is produced in the oceans half the world's oxygen half of the world’s oxygen net photosynthesis National Geographic that links sharks to oxygen half of the world’s oxygen half of the world’s oxygen all marine and terrestrial organisms half of the world’s oxygen