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.
“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.
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.
“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.
“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.
International
Bogotá and Quito Seek Dialogue After Tariffs and Power Cut Escalate Tensions
Bogotá and Quito will hold an emergency bilateral summit next week amid recent developments that have strained relations between the two countries.
Tensions escalated this week after Ecuadorian President Daniel Noboa unexpectedly announced a 30% tariff on Colombian imports. Colombia responded with a reciprocal measure, imposing the same tariff on around 20 Ecuadorian products and suspending electricity exports to Ecuador.
Aware that electricity imports are critical to easing Ecuador’s recent energy crises, Quito further imposed a 30% tariff on the transportation of Colombian oil through its territory.
However, recent statements from the Ecuadorian government suggest that dialogue between the two sides has intensified in recent hours. Ecuador’s Minister of Foreign Affairs, Gabriela Sommerfeld, confirmed that active conversations are under way.
In Colombia, segments of the business sector have welcomed the prospect of negotiations. The National Business Council (Consejo Gremial Nacional, CGN), for instance, urged both governments to restore commercial relations, warning that the dispute “puts jobs and regional economic stability at risk.”
International
Trump-Era Defense Plan Prioritizes Border Security and Scales Back Global Commitments
The U.S. military will prioritize the defense of the homeland and the deterrence of China, while providing more limited support to its allies and elevating Latin America as a key focus of its agenda, according to a Pentagon strategic document released on Friday.
The 2026 National Defense Strategy (NDS) represents a significant shift from previous Pentagon policies, both in its emphasis on allies assuming greater responsibility with reduced backing from Washington and in its more moderate tone toward traditional adversaries such as China and Russia.
“As U.S. forces focus on defending the homeland and the Indo-Pacific, allies and partners elsewhere will assume primary responsibility for their own defense, with crucial but more limited support from U.S. forces,” the document states.
The previous defense strategy, published during President Joe Biden’s administration, described China as Washington’s most consequential challenge and characterized Russia as an “acute threat.”
The new strategy, however, calls for maintaining “respectful relations” with Beijing and makes no reference to Taiwan, the democratically governed island claimed by China and allied with the United States. It also describes the threat posed by Russia as “persistent but manageable,” particularly affecting NATO’s eastern members.
While both the Biden-era strategy and the Trump administration’s approach emphasize the importance of defending U.S. territory, they differ significantly in their assessment of the challenges facing the country.
The Trump administration’s NDS sharply criticizes the previous government for neglecting border security, arguing that this failure led to an “influx of illegal immigrants” and widespread narcotics trafficking.
International
Guatemala considers sending high-risk gang members to military prisons
Amid the escalating crisis in Guatemala’s prison system, the government is considering transferring high-risk gang members to military-run detention facilities, a move that analysts say could help address overcrowding and the lack of control in civilian prisons.
The debate has gained urgency following the killing of ten police officers by gang members, reportedly in retaliation after the government refused to meet demands made by Aldo Dupie Ochoa, alias “El Lobo,” leader of the Barrio 18 gang, which authorities identified as responsible for the attack.
Guatemala’s Minister of Defense, Henry David Sáenz, told local media that the possibility of relocating high-danger inmates to military brigades has not been formally discussed. However, he noted that the practice is not new to the Armed Forces and said it is something that “was already being done.”
One example is the detention center located within the Mariscal Zavala Military Brigade, in Zone 17 of Guatemala City, where several inmates are held under military supervision. The facility also houses high-profile detainees, including former official Eduardo Masaya, who faces corruption charges.
In 2015, a ministerial agreement authorized the establishment of the Zone Seventeen Detention Center within the brigade, with a maximum capacity of 114 inmates in Area A and 21 in Area B. The agreement specified that the facility would be used exclusively for civilians or military personnel considered at risk of assassination.
Additionally, since 2010, a prison has operated within the Matamoros Barracks in Zone 1 of Guatemala City, holding dangerous or high-profile inmates. However, media outlets have described these military detention centers as “VIP prisons,” particularly for former government officials such as ex-president Otto Pérez Molina.
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