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Costa Rica crocodiles survive in ‘most polluted’ river

Foto: Ezequiel Becerra / AFP

| By AFP | Alberto Peña |

In one of the most polluted rivers in Central America, a vulnerable crocodile species is thriving despite living in waters that have become a sewer for Costa Rica’s capital, experts say.

Every day, trash and wastewater from San Jose households and factories flood into the Tarcoles River, which vomits tires and plastic into the surrounding mangroves.

Nevertheless, some 2,000 American Crocodiles have adapted to life in the toxic river that bears witness to the country’s decades-long battle with waste management.

“It is a super-contaminated area, but this has not affected the crocodile population,” said Ivan Sandoval, a biologist with the National University of Costa Rica.

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“The Tarcoles River is the most polluted river in Costa Rica, and one of the most contaminated in Central America. Heavy metals, nitrites, nitrates, and a large amount of human waste can be found,” added the crocodile expert.

According to the International Union for Conservation of Nature (IUCN), there are only about 5,000 of the crocodile species — found in 18 countries — left in the world after decades of hunting and habitat loss.

The organization lists the Crocodylus acutus as “vulnerable,” but says its numbers have increased in recent years. The Costa Rica population is “healthy and robust.”

Indeed, the large reptiles — basking in the sun and occasionally feeding on fish that come up the channel from the sea — appear unphased by some 150 types of bacteria that Sandoval says have been detected in the river.

He describes the carnivores as “living fossils” with the capacity to survive very tough conditions. 

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“They haven’t had to change anything in millions of years, they are perfectly designed.”

Laws not applied

Sandoval said that since 1980, Costa Rica’s population of the crocodiles “are recovering,” and warns of the threat of tourist activities.

The river’s crocodiles are a major draw for foreign visitors, who take boat tours to see the creatures up close.

Some feed the animals, which is prohibited, and Sandoval worries about them getting too used to being close to people. 

Juan Carlos Buitrago, 48, who captains one of the tour boats, says he and other locals regularly pull hundreds of tires and plastic waste from the water.

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He delights in the fauna of the river, with macaws flying over ahead at sunset, but wishes his countrymen would stop polluting his “office.”

“We cannot hide the pollution,” he tells AFP.

Costa Rica has impressive environmental credentials, with a third of its territory marked for protection, 98 percent renewable energy, and 53 percent forest cover, according to the UN’s environmental agency.

However, the law is not always strictly applied, as in the case of the Tarcoles River.

Lawyer and environmentalist Walter Brenes, 34, said that all of Costa Rica’s rules and regulations “do not solve the problem.”

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He said the country needs “real public policy that is completely aimed at protecting wildlife.”

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Central America

Arévalo calls corruption the “fuel of inequality” and reaffirms commitment to public transparency

Bernardo Arévalo rejects suspension of his party in Guatemala

Guatemala’s President, Bernardo Arévalo, stated on Friday that corruption is “the food of misery” in his country and reaffirmed his government’s commitment to continuing to strengthen public spending transparency.

During the first anniversary of the National Commission Against Corruption (CNC) established by his administration, the president expressed his satisfaction with the progress made.

“The road has been difficult,” he said, “but I am greatly satisfied with the fight against corruption, which is the fuel of inequality and the food of misery,” the president declared before members of the international community and government officials.

Arévalo also mentioned that the people who elected him in 2023 for a four-year term that began on January 14, 2024, “demand that we combat corruption.”

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Central America

Zúñiga hopes CIDH experts can help investigate intellectual authors of Berta Cáceres’ murder

Bertha Zúñiga, daughter of the murdered Honduran environmentalist Berta Cáceres, expressed her hope on Friday to EFE that the expert group appointed by the Inter-American Commission on Human Rights (CIDH) will help investigate the authorship of the crime to “heal the wounds” and rebuild the social fabric in indigenous communities affected by the hydroelectric project her mother opposed.

The Interdisciplinary Group of Independent Experts (GIEI) represents an “effort to exhaust the investigations” into the responsibilities of all individuals involved in Cáceres’ murder, as well as in the “violence suffered” from the implementation of the Agua Zarca hydroelectric project, led by the company Desarrollos Energéticos S.A. (DESA), emphasized Zúñiga.

“We hope that, with the collaboration of the prosecutorial entities, (the experts) will effectively collaborate to move forward on what we have proposed and demanded for many years: formally requiring the intellectual authors of this crime and analyzing the related crimes,” including corruption and other violations, as well as proposing a comprehensive reparation plan for the victims of the hydroelectric project,” Zúñiga explained.

The CIDH appointed a group of four experts from Argentina, Chile, the United States, and Guatemala on Friday to provide technical assistance to Honduras in investigating the intellectual authorship of Cáceres’ murder, which occurred on March 2, 2016, while she was sleeping in her home in La Esperanza, despite the multiple death threats she had reported due to her opposition to the Agua Zarca project.

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Central America

Nicaragua’s family confinement program: 7.18% of released prisoners reoffend

Nicaraguan authorities have released a total of 48,964 common prisoners under the family confinement regime over the past ten years, with 7.18% of them reoffending by committing at least one crime, according to the country’s vice president, Rosario Murillo.

Murillo, who is also the wife of Nicaraguan President Daniel Ortega and appointed “co-president” in a reform to the Constitution, stated through official media that “7.18% are individuals who have reoffended in criminal activity from 2015 to today, February 14, 2025.”

This means that 3,515 out of the 48,964 common prisoners with final sentences who have been granted family confinement privileges have returned to criminal activity, according to the report.

The early release of common prisoners has faced criticism, particularly from feminist organizations, who argue that these benefits have contributed to an increase in femicides and general crime in Nicaragua.

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