Air pollution generated from airport activities has become public concern and the subject of more rigorous government regulations.  The Airport Operators are stipulated to control the pollution and for the accountability of air quality that might affect public health. The main objective of this study is to establish a model for the distribution of air pollutants and to predict their concentrations generated by the runway and apron operations at Sam Ratulangi International Airport (Manado) until 2024, in accordance with the airport expansion program. The data was collected in the airport surrounding area in 2018, while the climate data over a span of 10 years, from 2009 to 2018, was obtained from Sam Ratulangi Meteorological Station. The modeling on dispersion of air pollutant gases was developed by the Gaussian Plume Equation. The simulation was performed using AERMOD software, and the results visualized by GIS software. AERMOD software was recommended by the US-EPA to predict the impact of air pollutants. The results predicted that the maximum concentrations of NOx; HC; and CO generated by runway activities modeling in 2024 were 250 μg.m-3; 6.4 μg.m-3; and 87 μg.m-3 respectively. The results also predicted that the maximum concentrations of NOx; CO; and PM10 due to apron operational activities in 2024 were 260 μg.m-3; 892 μg.m-3; and 2.5 μg.m-3 respectively. The model predicted that in 2024 the air pollution at Sam Ratulangi International Airport will remain under the limit as defined in Indonesian Government Regulation No. 22 of 2021. To mitigate the future increase in air emissions due to the increase in airport capacity, the recommendation were proposed in the several areas, which were including operation management, technology, policies and airport regulations, as well as the provision of green area.

Every household produces waste and the waste problem is increasing in line with the human population. Therefore, every family must understand how to process the waste at the first stage correctly so the residues can be reduced. The small amount of the residues may not put burden in the waste Final Processing Site. The purpose of this study was to calculate waste production of members of the villagers enterprise body (Bumdes) of Sendangtirto Village, Berbah, Sleman, DIY. This study would evaluate the waste management and provide strategies to improve the Bumdes efficiency. The research method was conducted by visiting waste processing site, interviewing selected respondents, SWOT test and evaluating the results descriptive qualitatively. It was recognized that the respondents did not segregate their waste, there was a high potential for waste management through 3R program, and predominantly of the respondents agreed to carry out waste segregation at the first stage.

An analysis of the quality of rainwater has been carried out in rainwater storage tanks in Sirongo Village, North Tidore District, Tidore Islands City. The purpose of this study was to identify the quality of rainwater storage (PAH) based on the drinking water quality requirements according to the Minister of Health of the Republic of Indonesia No. 492/MENKES/PER/IV/2010 and knowing the quantity of water in meeting the drinking water needs of the local community. The results showed that based on the quality standards in the Regulation of the Minister of Health of the Republic of Indonesia No. 492/ Menkes/ Per/ IV/ 2010 concerning requirements for drinking water quality, rainwater quality in Sirongo Village is viewed from the physical parameters (Odor, Taste, Color, Temperature, and turbidity), chemical parameters (Flourida) and biological parameters (total coliform), meet the quality standards, while the chemical parameters (Iron and pH) do not meet the quality standards. Rainwater storage (PAH) in Sirongo village cannot meet the community's water needs because it is influenced by the amount of water used by each family member and the size of the PAH.