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Coastal environmental pollution is an increasingly complex problem in Indonesia, especially due to uncontrolled waste disposal. This study aims to analyze the impact of waste disposal on the environment in the coastal area of Putra Deli Beach, Deli Serdang Regency. The research approach used is mixed-method with data collection through direct observation, semi-structured interviews, and literature study. The results showed that plastic waste dominates the types of waste found at the research site and is the main cause of marine ecosystem pollution. The impacts include damage to marine biota habitat, decreased tourist attraction, public health problems, and economic losses for local businesses. The lack of waste management facilities and low environmental awareness also exacerbate this condition. Therefore, an integrated waste management strategy based on community and stakeholder collaboration is needed to maintain the sustainability of the coastal environment.

This research focuses on how community solidarity in Bimakarya Village, Bualemo Sub-district, contributes to the success of the coastal reforestation programme and its impact on social-ecological life. The method used in writing is by using a qualitative approach. Data collection techniques using observation and interview data. The result of the findings of this research writing is that community solidarity in coastal reforestation in Bimakarya Village, Bualemo Subdistrict is not only a physical activity, but is one of the processes in preserving the environment and building community awareness and concern for the coastal environment.

Garbage is the biggest threat, especially in Indonesia, statistically the second largest country in the world after China. Most of Indonesia's population lives in coastal areas and that is where most of the trash is found. Garbage on the coast can come from human activities such as tourists, municipal waste disposal and part of the river. The purpose of this research is to increase awareness and participation to create a clean environment to protect clean coastal and estuarine environments. The research method is library research with a systematic review design based on descriptive analysis, namely journal articles searched in the Google Scholar database. The results of the study applying the clean movement can minimize waste, and appeal to the public to have a sense of concern for the environment so that the beach is not polluted, does not damage the environment and maintains public health.

The community service program for planting mangrove trees at Tirang Beach, Semarang aims to increase public awareness of the importance of mangrove ecosystems and improve coastal environmental conditions. This program will be implemented through mangrove tree planting activities and counseling regarding the benefits of mangrove ecosystems for the environment. The method that will be used in this program is data collection through surveys to determine the level of public awareness regarding the importance of mangrove ecosystems and coastal environmental conditions. Furthermore, mangrove tree planting activities will be carried out together with the local community, involving experts in the environmental and fisheries fields. In addition, counseling will be carried out regarding the benefits of mangrove ecosystems for the environment, including as a place for various types of fish and wild animals to live, as well as protecting the coast from abrasion. Through this program, it is hoped that people will become more aware of the importance of preserving mangrove ecosystems and protecting the coastal environment. The expected results of this program are increasing public awareness of the importance of protecting the coastal environment and mangrove ecosystems, as well as increasing the number of mangrove trees on Tirang Beach. This program is also expected to be an example for other communities to preserve the environment and encourage the creation of a healthier and more sustainable environment.