This study aims to analyze language errors found in public media such as banners, posters, and billboards in Medan City. The errors analyzed include morphological, phonological, syntactic, lexical, and spelling mistakes that do not align with the Indonesian Language Spelling System (PUEBI) and the Indonesian Dictionary (KBBI). The method used is qualitative descriptive, with data collection through direct observation of public media in various locations in Medan City. The results show that language errors are generally caused by a lack of understanding of correct language rules, limited knowledge, and the use of everyday language mixed with colloquial or regional languages. The proposed solutions to address these issues are providing training for media creators, creating clearer language guidelines, and utilizing language technology for automatic spelling checks. The implications of this study are to raise public awareness about the importance of using proper and accurate Indonesian in public media, to support effective communication, and to avoid miscommunication.

This study examines community participation in chemical waste management in urban areas, aiming to understand the extent of community involvement in protecting the environment from the harmful impacts of hazardous waste. The introduction outlines the importance of managing chemical waste in densely populated urban areas and the risks arising from a lack of public awareness and knowledge. This research employs a qualitative approach, utilizing in-depth interviews, questionnaires, and direct observations. Interviews were conducted to explore community perspectives and motivations, questionnaires were used to assess their level of participation and understanding, and observations were carried out to examine real actions in waste management practices. The results indicate that community participation remains low, influenced by limited outreach, awareness, and support facilities. This study highlights the need for improved education, facility provision, and partnership programs between the government, community, and private sector for more effective and sustainable chemical waste management.