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Semarang City has experienced significant growth over the past five years (2020 – 2025). Rapid urban development has been positively correlated with increasing environmental burdens, particularly in solid waste generation. In Indonesia, the largest portion of municipal waste consists of food waste, followed by plastic waste. Among these, plastic waste is the most difficult to manage. It is estimated that around 70% of Indonesian households still burn their waste as a means of disposal. The burning of waste, especially plastics, releases toxic emissions such as dioxins, furans, and fine particulates, which pose serious health risks, particularly to the respiratory system. This practice not only worsens air quality but also threatens public health. This community service program focused on providing education about the thermal properties of waste and the negative impacts of plastic burning on both the environment and human health. The program aimed to improve public knowledge of the thermal characteristics of various types of waste and the hazards of plastic burning through accessible scientific outreach. The initiative is expected to raise awareness and understanding of environmentally friendly waste management alternatives such as waste separation, composting, and recycling. The activity was conducted in RW 01, Tugurejo Village, Tugu District, Semarang City.

Boyolali is known as a milk-producing city, which makes animal husbandry one of the biggest options for economic activity. Limited forage resources are one of the problems faced by breeders. This activity aims to provide fermentation training using dry leaves as an alternative animal feed. The method used is to collect dry leaves from local resources in Sumbung Village, followed by training on the fermentation process using probiotic bacteria, which has been proven to be effective in increasing the nutritional value of feed. Fermented dry leaves have an aroma and taste that livestock like, thereby increasing feed consumption. Utilizing fermented dried leaves as animal feed can be a sustainable solution for overcoming limited food sources in Sumbung Village. Apart from providing a higher-quality alternative feed, this research can also support efforts to manage dry leaf waste and encourage environmental sustainability.  

The problem of organic waste remains a serious issue in Indonesia, including in rural areas. Jatitamban Village, Bondowoso Regency, faces similar challenges due to household waste and residual by-products from local small enterprises producing tape and cassava chips, which are not yet optimally managed. The Community Service Program (KKN) of the University of Jember implemented an initiative to empower village youth through maggot cultivation as an environmentally friendly and economically valuable solution for organic waste management. This study employed a Community-Based Research (CBR) approach by engaging local youth as active partners in every stage of the program, including observation, planning, socialization, technical training, workshops, and monitoring. The results indicate that Black Soldier Fly (BSF) maggot cultivation serves as an effective strategy to reduce the volume of organic waste while producing value-added products such as alternative animal feed and organic fertilizer. The involvement of youth not only enhanced their knowledge and skills but also fostered environmental awareness and created new entrepreneurial opportunities. Furthermore, the program successfully established a solid and independent youth group capable of sustainably managing organic waste through maggot cultivation practices. The implications of this program extend beyond environmental improvement to promoting village economic independence through the utilization of organic waste. Therefore, youth empowerment through maggot cultivation can serve as a strategic model for sustainable waste management as well as strengthening community capacity in rural areas.

Opinion is a person's opinion or thought regarding a problem that is currently occurring in society. An opinion must pay attention to the effectiveness of the sentence so that the reader can capture its contents. Therefore, this study will focus on the effectiveness of a sentence in a collection of opinions. This study was conducted to describe the effectiveness of sentences in a collection of opinions as critical reading teaching materials. This type of study is qualitative with a descriptive method; the technique for collecting data is using the listening and note-taking technique. The results of this study indicate that there are still several sentences that are not effective, so that readers have difficulty capturing their contents properly. Effective sentences meet requirements such as the economy of words, commensurate structure, logical language, and careful reasoning. Meanwhile, ineffective sentences occur because the structure of the sentence does not show unity, is wasteful of words or long-winded explanations, and lacks clarity in conveying information. The benefits of this study, in practice, are that it makes it easier for readers to determine the effectiveness of sentences in a collection of opinions. This study took data in the form of ineffective sentences contained in a collection of opinions for statistical literacy, the November 2024 edition of critical reading teaching materials for high school students.

Extreme poverty remains a major challenge in rural areas of Indonesia, including Nagori Bandar Manik, Pamatang Sidamanik District, Simalungun Regency. The 2025 UINSU Community Service Program (KKN) was carried out to empower local communities through various activities covering economic, educational, religious, social-environmental, and health aspects. This program employed a qualitative approach by involving active community participation in needs assessment, socialization, training, and evaluation. In the economic aspect, workshops on dishwashing liquid and herbal pesticide production were implemented as alternative household businesses. The educational sector included religious moderation through a short movie screening Mabbere, anti-bullying campaigns, ecoprint totebag training, and teaching at kindergarten, elementary, and junior high school levels. In the religious field, activities included Qur’an learning after Maghrib with children and Yasin recitals for both men and women. The social-environmental aspect was realized through community clean-up, educational boards on waste decomposition, distribution of garbage bins, and environmental awareness campaigns. Meanwhile, the health aspect focused on education about clean and healthy living behaviors, stunting prevention campaigns, and community exercise. The findings revealed improvements in entrepreneurial skills, children’s literacy, spiritual values, environmental awareness, and healthy lifestyles. The implication highlights that multidimensional community empowerment can serve as an effective strategy to reduce extreme poverty and promote sustainable village development.  

Opinion is a person's opinion or thought regarding a problem that is currently occurring in society. An opinion must pay attention to the effectiveness of the sentence so that the reader can capture its contents. Therefore, this study will focus on the effectiveness of a sentence in a collection of opinions. This study was conducted to describe the effectiveness of sentences in a collection of opinions as critical reading teaching materials. This type of study is qualitative with a descriptive method; the technique for collecting data is using the listening and note-taking technique. The results of this study indicate that there are still several sentences that are not effective, so that readers have difficulty capturing their contents properly. Effective sentences meet requirements such as the economy of words, commensurate structure, logical language, and careful reasoning. Meanwhile, ineffective sentences occur because the structure of the sentence does not show unity, is wasteful of words or long-winded explanations, and lacks clarity in conveying information. The benefits of this study, in practice, are that it makes it easier for readers to determine the effectiveness of sentences in a collection of opinions. This study took data in the form of ineffective sentences contained in a collection of opinions for statistical literacy, the November 2024 edition of critical reading teaching materials for high school students.

The DH Building of the Electrical Engineering Study Program at Udayana University faces significant challenges in energy efficiency, as it still relies on conventional electrical systems. User negligence, such as forgetting to switch off lights and air conditioners (AC) after use, often results in unnecessary energy waste and increased operational costs. This issue highlights the urgent need for smart solutions capable of automating energy management, reducing waste caused by human error, and supporting the creation of a more efficient and sustainable campus environment. To address this problem, this study designs and implements a smart building system based on the Internet of Things (IoT). The system employs a NodeMCU ESP32 microcontroller as the main processing unit, integrated with a series of sensors including a DHT22 sensor for monitoring temperature and humidity, an MQ2 sensor for smoke detection, a PIR sensor for motion detection, and a PZEM-004T sensor for monitoring energy consumption. Control of electronic devices such as lights and AC units is carried out both automatically and manually through relay modules connected to the system. All sensor data and control functions are accessed via a web interface developed using the Laravel framework and a MySQL database. The testing results indicate that the designed system was successfully implemented and functions as expected. Sensor testing demonstrated high accuracy compared to standard measuring instruments, while the electronic device control system achieved an average response time of approximately 3.6 seconds, proving its reliability. Overall, the system provides a comprehensive solution for energy consumption monitoring and control, while also enhancing comfort and safety in the DH Building, in line with the goals of energy efficiency and facility modernization.

This study explores the transformative role of youth empowerment through green economy initiatives, specifically focusing on the management of a waste bank in Kedungsekar Village, Indonesia. Facing mounting environmental challenges such as waste accumulation and pollution, the local community sought sustainable solutions by integrating environmental, social, and economic dimensions. The involvement of youth, characterized by creativity, digital skills, and strong social networks, has been pivotal in driving this transformation. The waste bank functions as a social innovation that not only addresses waste management issues but also generates economic opportunities through circular economy practices. By actively participating in waste segregation, collection, and sale, youth have acquired operational and financial skills, enabling them to become entrepreneurs and community leaders. This initiative has shifted youth from passive recipients to active agents of change, fostering community awareness and environmental responsibility. Employing qualitative case study methods, including interviews, observations, and document analysis, this research highlights how integrated efforts rooted in environmental sustainability and community participation can catalyze socio-economic growth. The theoretical framework draws on the concepts of green economy, youth empowerment, and social innovation, illustrating how these pillars are interconnected in fostering sustainable development. Findings reveal that the green economy approach, facilitated by youth engagement, enhances local resilience, creates employment, and promotes environmental conservation. This case exemplifies the potential of grassroots initiatives in achieving sustainable transformation at the village level, serving as a model for other rural communities facing similar environmental and socio-economic issues. The study underscores the importance of empowering youth as key drivers in the transition towards sustainable and inclusive development.

The problem of waste in rural areas is still a serious issue that has an impact on environmental health and the quality of life of the community. Batu Licin Village, Gunung Lengkuas Village, East Bintan District, Bintan Regency is one of the areas that faces similar problems, where household waste is still scattered and has not been handled optimally. This community service activity offers innovative solutions through the manufacture of rocket stoves as a means of efficiently burning certain organic and inorganic waste, as well as the construction of garbage booths as a place to store and sort waste before further processing. The implementation method involves counseling to residents, making prototypes, and direct practice of using rocket stoves and garbage booths by local communities. In addition, this activity also emphasizes the importance of changing community behavior in managing waste with the 3R (reduce, reuse, recycle) principle. The results of the activity show an increase in public awareness in managing waste independently, reducing the accumulation of waste in the village environment, and the emergence of alternative waste processing that is environmentally friendly, energy-efficient, and easy to apply. This innovation not only helps overcome the problem of household waste, but also provides educational value and empowers the community in maintaining the cleanliness and sustainability of the village environment. With the implementation of rocket stoves and garbage booths, it is hoped that a cleaner, healthier, and more viable village environment will be created in the long term.

The 2025 Real Work Lecture Program (KKN) of PGRI Wiranegara University (UNIWARA) Team 12 was carried out in Pohjentrek Village with a focus on empowering MSMEs, improving literacy, environmental education, food security, and character education. The main issues identified include low awareness among SME actors regarding the importance of business legality, low basic literacy skills among elementary school students, high rates of open waste burning, and the emergence of social issues related to bullying among teenagers. The methods used include mentoring, socialization, training, and active participation in community activities. The results of the activities showed that 15 MSMEs were successfully registered through OSS, with three of them obtaining NIB and halal certificates; tutoring and regular literacy assistance twice a week improved students' literacy skills; the initiation of a community literacy corner began to be implemented in one of the neighborhood associations (RT); socialization of waste management encouraged four households to practice composting; the introduction of vertical farming through the distribution of vegetable seeds supported family greening and food security; and anti-bullying socialization at SMPN 6 helped students recognize their potential using the SMART method. The conclusion of this program is that KKN is able to provide a multidimensional impact through collaboration between students, the community, and the village government, while strengthening community awareness of business legality, literacy, the environment, food, and character.

Strengthening religious moderation is a strategic effort to build a harmonious social life, especially in Berastagi, which is characterized by cultural, religious, and ethnic diversity. Through the Community Service Program (KKN) of UINSU students in 2025, various programs were designed to encourage community participation while raising collective awareness of the importance of religious moderation values. The main programs include a dish soap-making workshop as an economic empowerment initiative, an anti-bullying campaign to instill tolerance, an education awareness campaign to build a quality generation, the creation of educational boards on waste management to preserve the environment, and the “Sapa Desa” (Semangat Aksi Peduli Desa) movement to strengthen social relations. In addition, supplementary programs such as KKN Cerdas, RUMTAr, Gen Q, Spada, along with student involvement in the fruit and flower festival, selling local products, supporting farmers, and fundraising for the Independence Day celebration, further reinforced collaborative roles with the community. These activities are expected to create synergy between students and the people of Berastagi in fostering inclusive attitudes, mutual cooperation, and environmental care, making religious moderation not only a concept but also a real practice in social life.

The management of household waste remains a major challenge in society, especially in densely populated rural and urban areas. The practice of open burning of waste is still often carried out because it is considered quick and practical, despite its negative impacts on health and the environment. The smoke from burning can trigger respiratory diseases, reduce air quality, and accelerate global warming. In light of this issue, the 2025 KKN-T 23 UMSIDA students initiated a community service program by introducing an innovation in the form of an environmentally friendly waste bin that can reduce the practice of waste burning. This waste bin is designed with a system for separating organic and inorganic waste and special ventilation that accelerates the natural decomposition process. Through a participatory approach, students involve the community in the planning, creation, and testing of the innovative trash bins. The results of the activities show an increase in community awareness in sorting waste, a decrease in the habit of burning waste, and an improvement in the quality of the surrounding environment. This program has also successfully fostered collaboration between students, village officials, and residents in creating a greener and healthier environment. This trash bin innovation is hoped to be a sustainable model that can be implemented in various areas as a simple yet effective solution for community-based waste management.

Kebonagung hamlet in Sukolelo village is an area where the majority of residents cultivate bananas. The abundant banana production generates a considerable amount of waste, one of which is banana stems that are usually piled up, burned, or left to rot without further use. Therefore, this community service project aims to provide a comprehensive overview of the potential use of banana waste as raw material for organic compost in Kebonagung Hamlet, Sukolelo Village. The methods used in this study involved banana farmers as research subjects and banana stems as research objects, with data collection techniques including field observations, interviews with farmers, and composting experiments. Simple laboratory analysis shows that compost from banana waste contains 1.8% nitrogen (N), 0.9% phosphorus (P), and 2.3% potassium (K), making it highly potential for use as compost material. In addition, composting activities can create new jobs through the development of organic fertilizer management business units at the village level. This is in line with Sustainable Development Goal (SDG) 12 on responsible consumption and production. According to Santoso (2020), the benefits of compost include: (a) improving soil structure, (b) increasing soil water storage capacity, (c) increasing soil microbial activity, and (d) reducing dependence on chemical fertilizers. Qualitative data were analyzed through data reduction, data presentation, and conclusion drawing in the form of nutrient content analyzed using simple laboratory tests to determine the levels of N, P, and K. The banana waste composting process went well. In the first week, the temperature of the compost pile increased to 45°C, indicating high microorganism activity. The temperature stabilized at around 50–55°C. After the second week, the temperature decreased and stabilized close to the ambient temperature, indicating that the compost was mature.

Household waste management, especially organic waste, remains a major problem in many regions, including Pematang Guntung Village, Teluk Mengkudu District, Serdang Bedagai Regency. Improperly managed organic waste has the potential to cause unpleasant odors, environmental pollution, and become a source of disease. Therefore, an appropriate and environmentally friendly solution is needed to overcome this issue. This study aims to examine how the application of the biopore method can serve as a strategy to create a cleaner environment while simultaneously improving soil fertility. The research method used was qualitative, with data collection techniques including observation, interviews, and documentation. The data obtained were analyzed descriptively to illustrate the implementation of biopores in the community. The results showed that the application of biopores was able to significantly reduce the volume of household organic waste. Organic waste placed into biopore holes naturally decomposed into compost, which is beneficial as an environmentally friendly fertilizer. In addition, biopores improved soil water absorption capacity, which helps reduce waterlogging during the rainy season and maintain soil moisture. From a social perspective, biopores encouraged the development of new awareness among community members regarding the importance of waste management. This was demonstrated by the active participation of residents in creating, utilizing, and maintaining biopore holes sustainably. Thus, biopores function not only as a technical solution for organic waste management but also as an environmental education tool that strengthens community collaboration in maintaining cleanliness and enhancing soil fertility in their area.

The management of domestic wastewater remains a major challenge in rural areas, including in Central Tapanuli Regency. Limited community participation, low access to environmental information, and weak institutional support are key factors hindering sustainable sanitation efforts. This study aims to identify and analyze the factors influencing community roles in environmentally friendly wastewater management and to formulate empowerment strategies that align with local characteristics. This research uses a Mixed Methods approach, combining a descriptive quantitative method with multiple linear regression analysis to assess the influence of variable X1 (Knowledge), X2 (Access to Information), and X3 (Institutional Support) on variable Y (Community Role). Quantitative data were collected from 175 respondents using a closed-ended questionnaire, while qualitative data were obtained through in-depth interviews and field observations in four villages: Sipeapea, Pandan, Tapian Nauli, and Hutabalang. The results show that all three independent variables have a positive influence on enhancing community roles, with institutional support being the most dominant factor. In addition, qualitative interviews revealed a gap in practical knowledge and a need for stronger cross-sectoral communication. These findings indicate that optimizing community involvement strongly depends on continued education, information transparency, and institutional synergy. This study recommends intervention strategies including community-based sanitation education, the establishment of village environmental information systems, and the integration of waste management programs into regional development planning. These findings are expected to serve as a foundation for more adaptive, contextual, and sustainable environmental policymaking in Central Tapanuli.

Concrete roof tiles are an important material in building construction, particularly for roofing work, due to their advantages in terms of strength, durability, and material availability. This study aims to analyze two main physical characteristics of concrete roof tiles, namely bending load and water absorption, using a literature review approach from various previous studies. Bending load refers to the material's ability to withstand bending forces, while water absorption describes the material's capacity to absorb and store water through its pores. These two properties significantly influence the quality and durability of roof tiles in facing external environmental conditions, especially wet-dry cycles and mechanical loads. The results of the literature review indicate that the use of waste as an aggregate substitute in concrete mixes can significantly improve the performance of concrete roof tiles. For example, research using broken roof tiles and ceramic waste as aggregate substitutes successfully increased flexural strength to a range of 12.5–15.0 MPa. Meanwhile, variations in water absorption were recorded in the range of 4%–8%, depending on the material composition and production method. This proves that the use of recycled materials not only supports sustainability but also improves the mechanical and physical properties of concrete roof tiles. Overall, this study underscores the importance of material innovation in concrete roof tile production, particularly utilizing waste as an alternative aggregate. However, further research is needed to explore the best combination of materials and production techniques for producing high-quality, efficient, and environmentally friendly concrete roof tiles.

Plastic waste remains a pressing issue in Bakung Village, Teluk Betung Barat Subdistrict, Bandar Lampung City, as it affects public health, reduces environmental aesthetics, and triggers flooding due to poor waste management systems. In response, the 2025 Integrated Community Service Program (KKN) of UIN Raden Intan Lampung, through Group 98, applied the ecobrick method as a community-based alternative for managing plastic waste. This study adopted an appropriate technology approach with descriptive qualitative methods, namely observation, interviews, and documentation, to analyze field conditions and evaluate program outcomes. The results demonstrated the successful construction of a ±1-meter monument spelling “Bakung,” which incorporated more than 350 used plastic bottles as ecobricks. Beyond beautifying the environment and serving as a landmark, the monument inspired local residents to participate actively in sorting waste and making ecobricks. Community involvement was particularly visible during material collection and production stages, reflecting the effectiveness of a participatory approach. Additionally, this activity had an educational impact by showing that plastic waste can be transformed into useful and aesthetically valuable products. Although limited time and energy became major challenges, these were addressed through continuous mentoring. Overall, the program proved that ecobricks offer a practical and innovative solution for reducing plastic waste and contribute to achieving Sustainable Development Goals (SDGs) 11 and 12.

Used cooking oil is a household waste that may pollute the environment and harm human health if disposed of or reused improperly. This community service program aimed to provide a waste management solution while enhancing the community’s economic skills through training on producing aromatherapy candles from used cooking oil. The implementation method included awareness sessions on the hazards of used cooking oil, technical training using a learning by doing approach, and assistance in production and marketing. A total of 30 participants from the Family Welfare Movement (PKK) took part in the program. The results indicated improved knowledge and skills, the production of approximately 50 aromatherapy candles with lavender, rose, and vanilla scents, and the establishment of a community group committed to continuing independent production. The program contributed positively to the environment by reducing around 15 liters of waste oil per month and created new entrepreneurial opportunities for residents. Therefore, this initiative can serve as a sustainable community empowerment model based on circular economy principles.

This research discusses the effect of coconut dregs compost (Cocos nucifera L.) on the growth and yield of tomato plants (Solanum lycopersicum L.) cultivated using polybag media. This research is motivated by the importance of utilizing organic waste, especially coconut dregs, which has not been utilized optimally. Coconut dregs contain organic materials and nutrients that have the potential to increase soil fertility and improve the structure of the planting medium, so it is expected to support the vegetative and generative growth of tomato plants. The research design used was a Randomized Block Design (RBD) with six treatments and four replications. The treatments given were different doses of coconut dregs compost, namely P0 (control without compost), P1 (100 g/polybag), P2 (200 g/polybag), P3 (300 g/polybag), P4 (400 g/polybag), and P5 (500 g/polybag). The parameters observed included plant height, stem diameter, fresh weight, number of fruits per plant, root length, and estimated yield per hectare. The results showed that the application of coconut pulp compost significantly affected several growth parameters, such as plant height, stem diameter, and fresh weight. However, no significant effect was found on the number of fruits per plant or yield per hectare. The most prominent response was seen in the root length parameter, which showed a significant increase with increasing compost dosage. From the observations, the best treatment was at a dosage of 300 g/polybag (P3), which provided an optimal balance between vegetative growth and potential generative yield.

Waste remains one of the major environmental issues and a serious challenge in rural communities. The lack of discipline in waste disposal and limited knowledge of the impact of non-biodegradable waste have contributed to declining environmental quality and potential health problems. In Buniwangi Village, Pagelaran Subdistrict, Cianjur Regency, these conditions highlight the need for educational programs that provide practical understanding while fostering community awareness. This community service activity aimed to improve residents’ awareness of waste management through visual education media in the form of information boards displaying the decomposition time of various types of waste, ranging from organic to non-organic materials. The implementation method applied an asset-based community development (ABCD) approach, emphasizing active community participation. The program was carried out in three main stages: preparation, implementation, and evaluation. The preparation stage included location surveys, needs mapping, and obtaining permission from village authorities. The implementation stage involved designing attractive educational boards, installing them at strategic points in the village, and conducting socialization to explain the information provided. The evaluation stage was carried out through direct observation and short interviews to assess the program’s impact on community knowledge and behavior.The results indicated an improvement in residents’ understanding of the differences between biodegradable and non-biodegradable waste. Villagers began to show awareness of reducing single-use plastics and started applying the 3R principles (reduce, reuse, recycle) in daily life. Overall, this program had a positive impact by fostering greater environmental concern and became an initial step toward building a sustainable waste management culture in Buniwangi Village.