International

Chilean scientist plans to clean up mining with ‘metal eating’ bacteria

AFP

Starving microorganisms capable of surviving in extreme conditions have already managed to “eat” a nail in just three days.

In Chile, a scientist is testing “metal-eating” bacteria she hopes could help clean up the country’s highly-polluting mining industry.

In her laboratory in Antofagasta, an industrial town 1,100-kilometers north of Santiago, 33-year-old biotechnologist Nadac Reales has been carrying out tests with extremophiles — organisms that live in extreme environments.

Reales came up with her idea while still at university as she was conducting tests at a mining plant using microorganisms to improve the extraction of copper.

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“I realized there were various needs in the mining industry, for example what happened with the metallic waste,” she told AFP.

Some metals can be recycled in smelting plants but others, such as HGV truck hoppers that can hold 50 tons of rock, cannot and are often discarded in Chile’s Atacama desert, home to the majority of the country’s mining industry.

Chile is the world’s largest producer of copper, which accounts for up to 15 percent of the country’s GDP, resulting in a lot of mining waste that pollutes the environment.

In her research, Reales, who now runs her own company Rudanac Biotec, concentrated on iron-oxidizing bacteria called Leptospirillum.

She extracted the bacteria from the Tatio geysers located 4,200 meters above sea level, some 350 kilometers from Antofagasta.

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The bacteria “live in an acidic environment that is practically unaffected by relatively high concentrations of most metals,” she said.

“At first the bacteria took two months to disintegrate a nail.”

But when starved, they had to adapt and find a way of feeding themselves.

After two years of trials, the result was a marked increase in the speed at which the bacteria “ate,” devouring a nail in just three days.

– Surprising benefit –

Reales says “chemical and microbiological tests” have proved the bacteria are not harmful to humans or the environment.

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“We’ve always seen a lot of potential in this project that has already passed an important test in the laboratory,” said Drina Vejar, a microbiologist who is part of a four-person team working with Reales.

“It’s really necessary at this time when we have to plan for a more sustainable development, especially in all these cities with so many polluting industries.”

Mining companies have shown interest in the research but while Rudanac Biotec previously benefitted from a state fund for start-ups, the company needs investment to move on to its next stage of trials.

Reales says she needs money to see if her method will “eat a medium sized beam or a hopper.”

When the disintegration process is complete, what remains is a reddish liquid residue, a solution known as a lixiviant that itself possesses a surprising quality.

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“After biodisintegration the product generated (the liquid) can improve the recovery of copper in a process called hydrometallurgy,” said Reales.

Essentially, the liquid residue can be used to extract copper from rock in a more sustainable manner than the current use of chemicals in leaching.

Reales says it means green mining is “totally feasible.”

That is of great interest to mining companies that could use it to improve their large scale extraction of copper or other minerals, while also reducing their pollution, something they are required to do by law.

Reales recently submitted a request for an international patent for her technology, but more importantly she hopes it will help reduce metal waste blotting the landscape in the mining regions of her country.

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International

UK braces for potential CO₂ shortage amid Middle East tensions

The government of United Kingdom is preparing contingency measures amid fears of a potential shortage of carbon dioxide (CO₂), which could impact the agri-food industry if the Strait of Hormuz remains blocked due to the ongoing conflict in the Middle East, The Times reported on Thursday.

According to the newspaper, officials assessed this scenario during a recent crisis meeting aimed at evaluating the consequences of a prolonged conflict, triggered on February 28 by joint attacks from United States and Israel against Iran.

Under this scenario, CO₂ supplies—primarily a byproduct of fertilizer production using natural gas—could fall by up to 18%, affecting multiple sectors including agriculture and food production.

The gas is widely used in the slaughter of pigs and poultry, as well as in extending the shelf life of packaged foods. Breweries could also face disruptions due to reduced availability.

“I don’t want to comment on a leak, but now that the information is out there, I hope people feel reassured knowing we are working on it,” said Peter Kyle, Secretary of State for Business and Trade, in remarks to Sky News.

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While a drop in CO₂ supply is not expected to cause major shortages in supermarkets, it could limit product variety, The Times noted, citing access to internal government documents.

To mitigate the impact, authorities are considering prioritizing CO₂ supply for critical sectors such as healthcare and civil nuclear energy, where it is used in cooling systems for blood reserves, organs, vaccines, and electricity generation. The government may also request domestic producers to increase output.

Central America

El Salvador and Paraguay approve 2026–2028 cooperation program

The governments of El Salvador and Paraguay approved the 2026–2028 Cooperation Program, which includes six joint development projects, according to Salvadoran Vice Minister of Foreign Affairs Adriana Mira.

Mira stated that El Salvador will act as the “main provider of cooperation,” contributing five initiatives focused on road infrastructure, tourism, and local development. She also noted that one of the projects will be led by the Paraguayan side, although no further details were disclosed.

The agreement was reached during the Second Meeting of the Joint Commission on Technical and Scientific Cooperation between both countries.

According to Paraguay’s Ministry of Foreign Affairs, the First Meeting of the Political Consultation and Bilateral Coordination Mechanism was also held, with the participation of Vice Minister Víctor Verdún.

In an official statement, the Paraguayan government reported that both delegations agreed to identify mechanisms to promote competitiveness, economic growth, and market access. They also committed to signing agreements related to air transport cooperation.

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International

Macron meets Machado, stresses need for democratic transition in Venezuela

Emmanuel Macron met on Monday at the Élysée Palace with Venezuelan opposition leader María Corina Machado, where they discussed the importance of advancing a democratic transition in Venezuela.

In a message shared on social media, Macron highlighted Machado’s commitment to freedom and stressed the need to achieve a transition that is peaceful and respects the will of the Venezuelan people.

“I received María Corina Machado, Nobel Peace Prize laureate. Together, we discussed her commitment to freedom and the importance of achieving a democratic, peaceful transition in Venezuela that respects the will of its people,” he wrote.

For her part, Machado expressed her “deep gratitude” to Macron and to France for their support of democracy and freedom in Venezuela.

“We have gone through a long and painful journey, and we are now very close to freedom. Venezuela will become a nation of free and equal men and women—prosperous, safe, and united,” she said.