Draped in a colorful saree and shirt, Lakshmi Murgesan dives into the azure waters off India’s southern coast to collect seaweed, which is being hailed by scientists as a miracle crop that absorbs more carbon dioxide than trees.
India is the world’s third largest carbon polluter, behind China and the US, and has yet to set a target date for its emissions to reach net zero.
But authorities are looking into how seaweed farming could help reduce the impact of greenhouse gas emissions, reverse ocean acidification and improve the marine environment, as well as providing a sustainable livelihood for marginalized coastal communities.
Photo: AFP
“I am doing this for my children... It requires a lot of hard work, but I am able to earn good profits from about four months of work,” said Murgesan, who makes 20,000 rupees (US$265) each month farming the fibrous macroalgae. “I would not have been able to educate my children but after doing this, I could send my children to college,” she added, smiling as she emerged from the waters in Rameswaram, in the southern state of Tamil Nadu.
M Ganesan, a government marine scientist, said seaweed provides a possible way forward as coastal habitats and wetlands absorb five times more carbon than terrestrial forests.
“It is a miracle crop in many ways, it is eco-friendly, it doesn’t use land or fresh water. It absorbs carbon dioxide dissolved in water during photosyntheses and oxygenates the entire marine ecosystem,” Ganesan said.
India, which has an 8,000km coastline, is now aiming to boost production from the current 30,000 tons to more than one million tons each year by 2025.
Globally, seaweed production was worth around US$12 billion in 2019 and is expected to grow to US$26 billion by 2025, with China and Indonesia having 80 per cent of the market share.
FOOD, FUEL, FERTILIZER
Murgesan is part of a team of women who work together to cultivate fronds of seaweed on bamboo rafts, before harvesting and drying them. The tropical waters of Tamil Nadu form an ideal environment — with one raft yielding up to 200kg in around 45 days.
The product is then sent for sale in markets nationwide as well as the US and Australia through AquAgri, a private company that promotes algal cultivation in India. Popular in East and South East Asian cuisine, seaweed is also used in medicine, cosmetics, bio-fertiliser and bio-fuel.
“Seaweed has major use as a crop bio-stimulant for increasing productivity and making the crop more resilient to climate induced stresses. It’s also used as a major ingredient in meat and food processing,” said Abhiram Seth, managing director of AquAgri. And while it has not been traditionally popular in India, in July the government announced some US$85 million in subsidies for seaweed farming initiatives over the next five years. Seaweed cultivation is already common in Japan, China, Indonesia and the Philippines.
Interest is growing in Australia, which has outlined a plan to develop a US$100 million industry by 2025.
Seth said there was potential to benefit both the environment and farmers like Murgesan.
“Seaweeds clean up the water. At the same time seaweed cultivators get a sustainable income without having to relocate to urban areas to find work,” he explained.
GROW WHAT WE NEED
Seaweed does not require fertilizer, freshwater or pesticides. Kelp, one of the most commonly farmed types, grows at a rate of 61cm a day. They absorb an estimated 173 million metric tons of carbon each year — the same annual emissions as New York State, according to a 2016 paper in Nature Geosciences.
And a recent study by the University of California found that mixing red seaweed in animal feed could help reduce methane emissions.
“We now have sound evidence that seaweed in cattle diet is effective at reducing greenhouse gases and that the efficacy does not diminish over time,” Ermias Kebreab, director of the World Food Center, said in the research.
As well as absorbing carbon dioxide when it is alive, when it dies and drops to the seafloor, seaweed also keeps carbon in the sediment, Ganesan added. However scientists say there can be downsides to farming it.
“Overharvesting seaweed has its drawbacks because it forms the food for many reef dwelling creatures like sea urchins and reef fish,” said marine biologist Naveen Namboothri, from Dakshin Foundation, adding that extraction could disturb the reef.
Conscious of these risks, Murgesan and the other farmers work for only 12 days a month and don’t harvest during the main fish breeding season, between April and June.
Seaweed farmer Vijaya Muthuraman, who never went to school, relies on traditional knowledge.
“We only grow as much as we need and in a way that doesn’t harm or kill the fish,” she said, sitting on the shore after the day’s toil, the gentle surf rising and ebbing behind her. The dangers of getting hurt by the rocky sea bed or stung by jellyfish always lurk for the women, but they appeared undaunted, laughing and chatting away their worries.
“We face a lot of hazards but this work has given me and my family some dignity,” she said, adding: “Our living standards have improved and now others in my village also want to become seaweed farmers.”
Oct. 27 to Nov. 2 Over a breakfast of soymilk and fried dough costing less than NT$400, seven officials and engineers agreed on a NT$400 million plan — unaware that it would mark the beginning of Taiwan’s semiconductor empire. It was a cold February morning in 1974. Gathered at the unassuming shop were Economics minister Sun Yun-hsuan (孫運璿), director-general of Transportation and Communications Kao Yu-shu (高玉樹), Industrial Technology Research Institute (ITRI) president Wang Chao-chen (王兆振), Telecommunications Laboratories director Kang Pao-huang (康寶煌), Executive Yuan secretary-general Fei Hua (費驊), director-general of Telecommunications Fang Hsien-chi (方賢齊) and Radio Corporation of America (RCA) Laboratories director Pan
President William Lai (賴清德) has championed Taiwan as an “AI Island” — an artificial intelligence (AI) hub powering the global tech economy. But without major shifts in talent, funding and strategic direction, this vision risks becoming a static fortress: indispensable, yet immobile and vulnerable. It’s time to reframe Taiwan’s ambition. Time to move from a resource-rich AI island to an AI Armada. Why change metaphors? Because choosing the right metaphor shapes both understanding and strategy. The “AI Island” frames our national ambition as a static fortress that, while valuable, is still vulnerable and reactive. Shifting our metaphor to an “AI Armada”
The older you get, and the more obsessed with your health, the more it feels as if life comes down to numbers: how many more years you can expect; your lean body mass; your percentage of visceral fat; how dense your bones are; how many kilos you can squat; how long you can deadhang; how often you still do it; your levels of LDL and HDL cholesterol; your resting heart rate; your overnight blood oxygen level; how quickly you can run; how many steps you do in a day; how many hours you sleep; how fast you are shrinking; how
“‘Medicine and civilization’ were two of the main themes that the Japanese colonial government repeatedly used to persuade Taiwanese to accept colonization,” wrote academic Liu Shi-yung (劉士永) in a chapter on public health under the Japanese. The new government led by Goto Shimpei viewed Taiwan and the Taiwanese as unsanitary, sources of infection and disease, in need of a civilized hand. Taiwan’s location in the tropics was emphasized, making it an exotic site distant from Japan, requiring the introduction of modern ideas of governance and disease control. The Japanese made great progress in battling disease. Malaria was reduced. Dengue was
RSS