In this Sept. 27, 2018, photo provided by Green Grazing, Australis Aquaculture employee Khanh Huynh checks on seaweed cultures, near Ninh Hai, Vietnam, Australis’s “Greener Grazing” project seeks to make a kind of seaweed that helps reduce methane emissions in livestock available to more farmers. (Josh Goldman/Green Grazing via AP)
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