The Mantaro River in Peru, particularly in the Huancavelica region, has been significantly impacted by toxic waste and mineral residues from industrial and mining activities. Using a grey system model based on the grey clustering method, researchers assessed water quality at nine monitoring points, focusing on six physicochemical parameters. The study found that one monitoring point, influenced by mining activities, was highly contaminated, while others were classified as non-contaminated. The results highlight the need for effective water management and regulatory actions to ensure environmental sustainability and public health.

The Montreal Protocol 2014 (MP14) is crucial for addressing disruptive passengers by expanding applicable jurisdiction and enhancing safety measures. Despite its benefits, Colombia has not ratified MP14, relying instead on outdated frameworks from the Tokyo Convention of 1963. This lack of ratification hinders the aviation industry's progress and international cooperation in managing passenger safety. The article argues that the Colombian government should reconsider its stance, emphasizing the protocol's potential to improve global collaboration and security in aviation.

Valeria Guerrero, an academic tutor at Universidad Andina Simón Bolívar, discusses methods to prevent and detect plagiarism in academia. Drawing from her extensive educational background and professional experience, she emphasizes the importance of maintaining academic integrity.

The article discusses the environmental and social impacts of the salmon industry in Chilean Patagonia, highlighting the debate between economic benefits and ecological damage. It criticizes the government's regulatory efforts and the media's portrayal of environmental issues. The article also mentions international and local figures advocating for better environmental practices, and points out the health risks faced by workers in the industry.

Since the start of protests in Colombia on April 28, the Risaralda Human Rights Table, comprising defenders from unions, organizations, collectives, and independents, has recorded approximately 180 instances of physical aggression, violent dispersal of protests, arbitrary detentions, and even the use of firearms by public forces. Lawyer Adriana González, a member of the Table, reported these findings on RCN Radio and will present them to the International Mission S.O.S Colombia in Pereira. The aim is to pressure the national government to return to a state of democracy by respecting and guaranteeing the rights of all citizens, as per its international obligations.

The indigenous population in Mexico has increased to 6.1% of the total population, with 865,972 people not speaking Spanish, concentrated in Oaxaca, Chiapas, and Yucatán. Despite the pandemic, translated messages in indigenous languages remain minimal. Indigenous communities in Peru, totaling 55, have lost over 37,000 lives to COVID-19. Many are days away from supply centers, facing inaccessible prices and lack of government support. Comando Matico activists provide medical treatment to these communities. In Paraguay, the Nanawa community, bordering Argentina, has been economically devastated by the pandemic, with strict border controls affecting families reliant on Argentine commerce. Argentina and Paraguay have reported over 1.9 million and 130,260 COVID-19 cases, respectively. Migrants in northern Italy face aggression from local police, with activists helping them. In Spain, abandoned villages are sought after for habitation, offering a lifestyle away from large agglomerations, while cities like Málaga face severe pandemic restrictions.

Johann Gutenberg, born around 1400 in Mainz, Germany, is celebrated for perfecting printing techniques by creating movable metal type, revolutionizing the printing process. Despite financial struggles and dying in poverty, his legacy endures through the Gutenberg Bible, published with the help of Johann Fust and Peter Schöffer.