An aquaculture start-up says it is accelerating plans to commercially cultivate New Zealand seaweed for methane-busting livestock feed. CH4 Global was founded by a group of local tech and bioscience entrepreneurs developing the feed product made from Asparagopsis armata - a native red seaweed which grows in New Zealand and South Australian waters. Trials have shown the seaweed feed can reduce methane produced by cows by up to 90 percent. CH4 Global President and Chief Executive Dr Steve Meller says the company has recently successfully cultivated all the life cycle stages the seaweed, and it will move to speed up commercial expansion of operations in New Zealand and Australia.