Farming Pyropia (Nori) in Korea (IMAGE) Terry Collins Assoc Caption Seaweed farms now produce more than 25 million metric tonnes annually. The global value of the crop, US$6.4 billion (2014), exceeds that of the world's lemons and limes. Credit Gwang Hoon, UNU-INWEH / SAMS Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.