While Gelidium seaweeds can be collected by gathering fragments washed ashore, mass production of agar requires steady, large quantities.10 Harvesters in New Zealand during WWII had to “walk beside a boat, waist to armpit deep in water and feel for the weed with their feet.” Handling large volumes of wet seaweed (which yields less than five percent agar) was challenging. Then as now, when Gelidium is harvested by scuba divers from rocky seabeds, collectors have to understand the life cycle of the algae, find the most likely locations for its growth, and prevent overharvesting to safeguard future yields.
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Marianna SpringSocial media investigations correspondent
但這位總統面臨的挑戰在於，他的公眾支持率徘徊在40%左右，而美國民眾希望他採取更多行動來解決他們的擔憂。上個月，他在白宮發表全國演說時，也使用了類似主題與統計數據——但未能說服公眾。總統與他的幕僚似乎寄望於國情咨文更大的觀眾群（預計數千萬人）能帶來不同結果。