Cultural customs often condition solid waste management, especially in developing countries. The decomposition of solid waste depends on climatic conditions and is related to geomorphology and anthropogenic practices. Leachate generated in landfills can migrate superficially and underground, contaminating soils and aquifers. Knowing the level of contaminant load in leachate is important for proper solid waste management. However, in the Andean regions of Peru, there is scarce data on the polluting potential of leachates. This research aimed to determine the Leachate Pollution Index (LPI) according to the sub-indexes of organic, inorganic, and heavy metals from landfills in the high Andean regions of Peru. Physical, chemical, and microbiological parameters were evaluated in fresh and retained leachate samples, in both dry and rainy seasons, from two landfills located at around 3000 m of altitude. The results showed high contamination levels, particularly in BOD₅, COD, NH₃-N, and total coliforms, with high organic and inorganic sub-indexes that affect the LPI, indicating high levels of contamination and posing a potential risk to surrounding ecosystems. It was also found that the high Andean landfills studied have a good-to-high biodegradability. This research contributes essential baseline information for environmental monitoring and supports the need for improved leachate management in high-altitude landfills in Peru and similar Andean contexts.

Coffee production is one of the main sources of income for products from Peru’s inter-Andean valleys. However, the rugged geographical conditions offer few growing areas with different altitudes, which could lead to variations in the quality of the beans and, consequently, of the coffee in the cup. This study aimed to evaluate the effect of altitudinal gradients on the exportable yield, and physical and cup quality of the Typica and Catimor varieties produced in the Inkawasi inter-Andean valley of Cusco, Peru. Coffee beans produced at altitudes of 1600, 1800, and 2100 m were considered, and the physical quality of parchment and green coffee was evaluated using Peruvian Technical Standards and the SCAA guidelines. Similarly, the sensory attributes of the coffee in the cup were assessed according to criteria established by the SCAA by five certified tasters. It was observed that increasing altitude considerably reduces pest attack and damage in both varieties and increases secondary damage, shrinkage, and exportable yield, which ranged from 79.12 to 81.98%. Sensory attributes ranged from “Very Good” to “Extraordinary”, allowing the Specialty Grade (>80 points) to be achieved according to SCAA standards. The PCA revealed that the Typica variety has superior sensory qualities that improve with altitude. The coffee produced in the Inkawasi valleys is well received on the international market, especially that grown above 1800 m. Its sustainable cultivation could improve the socioeconomic conditions of its inhabitants.

Quinoa, considered a superfood, is grown in the high Andean zones of Peru and Bolivia. The competitiveness, organizational capacity, and technological level of the producers limit their production. This research aimed to evaluate the influence of competitiveness on the performance of quinoa producer associations in the high Andes. The study was developed in the production period of 2022–2023 and considered associations of quinoa producers from different localities. The correlation between competitiveness (corporate identity, resources, and potential) and production performance (financial and non-financial) was studied. The data were collected through a questionnaire with closed questions and a Likert scale and presented normal distribution, and a one-factor ANOVA, Pearson′s correlation, and PCA at 5% significance were applied. Twenty-three quinoa producer associations were identified with 15 years of organic quinoa production of the varieties of Blanca de Junín, Choclito, Pasankalla, Negra, and Roja, with production ranging from 17 to 40.8 tons grown in a semi-mechanized way. It was observed that the general competitiveness of the associations was rated as moderately inadequate despite good performance; this behavior was more marked in the associations in urban areas such as Andahuaylas and San Jeronimo. Urban quinoa associations have higher quality than rural ones. Competitiveness is limited by a lack of human resources training, government commitment, and strategic alliances, which predicts low sustainability.

Environmental wealth is the main basis of the social, cultural and economic development of a country, but if there is an absence of the valuation of these natural resources, it can lead to a disproportionate usufruct that causes the deterioration of the ecosystem and even collateral effects of human health. This research aimed to know the total economic value of the ecosystem of the high Andean water basin tributary of the Chumbao River, located between 2000 to 4800 meters above sea level belonging to the province of Andahuaylas, Apurimac region in Perú. The valuation procedure consisted of using the analytical method of multicriteria valuation applying the concept of Total Economic Value, which involved direct and indirect uses related to environmental assets, in which a collective panel of people from different training disciplines (experts) participated, which were made up of researchers, engineers, public officials, farmers and ecologists who had extensive knowledge about the environmental asset. of the geographical area in reference; and once the paired comparison survey was done, the total economic value was quantified up to three amounts, so the respondents were formed into three statistically significant segments (SIG<0.05). The cluster (1): assigned a weighting that quantifies to an economic value of USS 4,359,179,489.46; followed by cluster (2): an intermediate value of USS 4,029,902,444.41 and cluster (3): assigned a lower value to USS 774,163,167.16. Thus, it follows that, on average, 51.78% equals value in use and 48.21% equals value in non-use, respectively. This value expressed as an interval reflects the environmental ethical positions of the groups and makes available as an indicator to government authorities and society in order to exercise actions of environmental sustainability high andean.

Se intenta demostrar que la aplicación de estrategias de lectura mejora el nivel de comprensión de textos en los niños. Para conocer el nivel de comprensión de textos, se aplicó el Pre test al grupo experimental y grupo control. Se elaboró y ejecutó, en el grupo experimental, un programa de estrategias de lectura, que consta de 15 sesiones de aprendizaje, las mismas que presentan lecturas de interés. Posteriormente se aplicó el post test, en donde se evidenció que los estudiantes del grupo experimental habían mejorado su nivel de comprensión de textos. Los niños utilizaron estrategias como el subrayado, elaboración de un mapa mental de la lectura, fundamentaron sus respuestas, tuvieron una mayor concentración al momento de leer, lo que les permitió obtener mejores resultados. Estas estrategias las utilizaron también en otras áreas mejorando así su rendimiento. Los resultados obtenidos, permitieron concluir que este trabajo de investigación contribuye a la educación, ya que da solución a uno de los principales problemas como es la deficiencia en la comprensión de textos, siendo fundamental que los estudiantes conozcan y apliquen diversas estrategias que les permitan un aprendizaje óptimo y trascendental.

The quality of water for human consumption depends on the supply method and source type. Water may contain pathogens and excessive constituents that pose health risks, and timely monitoring and planned service provision help ensure its quality. This study assessed the supply system, quality, and health risks associated with the consumption of water from three sources in the high-elevation Andean city of Andahuaylas, Peru, managed by the Municipal Sanitation Service Provider Chanka (EMSAP). The sources were found to provide between 0.8 and 32 L/s, with consumption of about 17 m³ per connection per month, at a cost of 0.20 USD/m³. The system shows a current deficit and a projected deficit for 2027 due to increasing user debts and the absence of mechanisms for payment for ecosystem services (PESs), despite the existence of cross-subsidies. Water quality, assessed using the WQI-Pe, ranged from regular to excellent, although with high levels of heavy metals according to the Environmental Quality Standards for Water (EQS–Peru), which increases the non-carcinogenic health risk. Chronic non-carcinogenic exposure (HQ) from consumption and dermal contact exceeded one, mainly for arsenic (As), while the deterministically and probabilistically evaluated incremental lifetime cancer risk (ILCR) was linked to high levels of As, Cr, and Cd across all age groups (infants, children, adolescents, and adults). Overall, this study provides insight into the state of water in areas without conventional treatment, so the implementation of buffer zones in the basin’s headwaters in localities with similar characteristics is vital.