Ours is a water planet. Technology is shaping our uses, both as foe and ally. It has made humans the dominant predator and provides us food, gives us half the oxygen we breathe and created many maritime jobs. But technology has also raised CO2 levels, caused acidic oceans, threatened ocean biodiversity and created grand climate challenges. UCSB marine biologist Doug McCauley describes technology to promote ocean health and provide a balance. Series: "GRIT Talks" [Science] [Show ID: 35175]