YOKOHAMA, Japan: Seaweed has long been a staple food in Japan, but the chunky, slimy kelp hauled into fisherman Ryoichi Kigawa's boat is also starting to attract international attention for its potential as an ecofriendly super crop.

Research into new applications for the marine plant — from carbon absorption to reducing methane emissions from cattle — is flourishing, and countries are looking to Asia's seaweed savvy to develop their own industries.

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