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Green open space (RTH) utilization is an important part of spatial planning in Sidoarjo Regency. In urban ecosystems, public green spaces are open areas designed for recreation, nature conservation and greening in urban environments. According to Local Regulation No. 6/2009 on the 2009-2029 Sidoarjo District Spatial Plan (RTRW), public green open space (RTH) is designed for recreation, nature conservation and greening. RTH is an important component of Sidoarjo District's spatial planning, especially in urban ecosystems The purpose of this research is to evaluate the level of compliance of RTH utilization in Tanjung Puri Park with the provisions of Sidoarjo District Spatial Plan No. 6/2009. This evaluation was conducted to support sustainable development in Sidoarjo Regency.The results of this study provide the fact that, Green Open Space (RTH) Taman Tanjung Puri does not meet the standards of the Sidoarjo Regency Spatial Plan properly. This is due to the type of green space and its function not in accordance with the plan, as well as the lack of infrastructure and facilities. On the other hand, Tanjung Puri Park is still underutilized as a public space. This situation is also caused by a lack of budget, management facilities and infrastructure, poor public understanding of the park's existence and purpose, and low community involvement. The conclusion obtained in this study is that the potential of Tanjung Puri Park as a public space is hampered by a lack of planning. Taman Tanjung Puri has great potential to provide various environmental, social, and economic benefits, but it’s utilization has not been optimal due to the lack of supporting facilities, inconsistent maintenance, low community participation, and fragmented management being the inhibiting factors.

Green Open Space (GOS) is one of the efforts to deal with increasing GHG emissions because it has the ability to absorb CO2 emissions. Development Area IV Pekanbaru is one of the Development Areas that has the potential to produce carbon dioxide (CO2) emissions, specifically in Bukit Raya Pekanbaru District. This research was conducted to determine the number of motorized vehicles and the value of CO2 emissions produced each day, as well as the value of the capacity of GOS to absorb CO2 emissions from transportation activities in Bukit Raya Pekanbaru District. The method used is recording traffic activities to calculate the amount of CO2 emissions and calculating all public green open spaces with vegetation cover in the form of grasslands and trees with a diameter of ≥ 20 cm, as well as calculating the percentage of green open space absorption capacity. The research results obtained were that the value of CO2 emissions from transportation in Bukit Raya Pekanbaru District was 67,007,898 tons of CO2/year. Meanwhile, the capacity to absorb CO2 by public green open spaces is only 1,992.32 tons of CO2/year. The results show that public green open space in Bukit Raya Pekanbaru District in terms of absorbing CO2 emissions from transportation is still insufficient with a percentage of only 2.97%.

The fabric printing industry makes a major contribution to various kinds of textile products, its by-products, liquid waste, require special attention in environmental management. Most of the liquid waste originating from the fabric printing industry consists of dyes, solvents and other processing chemicals. To prevent negative effects on water quality and the surrounding environment, managing this waste is very important. To achieve sustainability, advances in liquid waste processing technology are very important. The solution to reduce the impact of liquid waste from the fabric printing industry is an advanced purification process. PT. X to reduce polutan parameter such BOD, COD , TSS, Ammonia and Total Colidform by. 90%, 95%, 95%, 85%, 20%, 90% And meets the specified quality standards. Because the pH parameters still meet existing quality standards, processing is focused on reducing the organic parameters which are quite high. The results of the process will be used again for flushing activities in green open spaces and for washing operational vehicles.

Plants are a group of living things that have many cells on earth. Plants have three parts, namely roots, stems and leaves. Babakan Siliwangi has been designated as the lungs of the city and a recreational area in Bandung by Unesco. Having an area of ​​3.8 hectares filled with various animals that complement the ecosystem, Babakan siliwangi has become a Green Open Space (RTH) that can be reached by the people of Bandung City. The Fabaceae family is one of the third largest families which belongs to the members of closed seed plants (Angiosperms) which are easily found in the surrounding environment which have a variety of morphology or stature ranging from herbs, seedlings, shrubs and trees.

Kota Kupang merupakan ibukota Provinsi Nusa Tenggara Timur (NTT) dengan luas wilayah sebesar 180,27 km². Letak Kota Kupang yang strategis, sebagai Ibukota Propinsi NTT menjadi daya tarik tersendiri bagi warga pendatang dari daerah-daerah lain. Jumlah penduduk di Kota Kupang pada tahun 2017 sebanyak 412.708 jiwa. Pertumbuhan penduduk Kota Kupang dalam waktu 8 tahun sejak tahun 2009 sekitar 121.708 jiwa atau sekitar 15.000 jiwa/tahun. Pertumbuhan penduduk di Kota Kupang memicu terjadinya peningkatan jumlah kendaraan yang berujung pada peningkatan pencemaran udara dari sektor transportasi. Sampai pada bulan Oktober tahun 2018 jumlah kendaraan di Kota Kupang tercatat sepeda motor sebanyak 25.362 unit dan mobil sebanyak 5.357 unit. Perkembangan kota dan pertumbuhan penduduk juga akan mengakibatkan konversi terhadap lahan-lahan hijau yang menyebabkan lahan untuk ruang terbuka hijau (RTH) semakin sempit. Penelitian ini menggunakan analisis deskriptif kuantitatif untuk mengetahui luas RTH yang dapat mereduski total cemaran yang terjadi diwilayah BWK II Kota Kupang. Hasil penelitian menunjukan bahwa ketersediaan RTH di Kota Kupang hanya sebesar 17,10% yang terdiri dari RTH Publik sebesar 13,11% dan RTH Privat sebesar 3,99%, total kebutuhan RTH di Kota Kupang agar dapat memenuhi syarat yang telah diatur dalam undang-undang yaitu sebesar 5408,1 Ha yang terdiri dari RTH Publik membutuhkan 6,88% atau 1241,49 Ha dan RTH Privat membutuhkan 6.00% atau 1082,7 Ha. Total emisi yang terjadi di sepanjang Jalur Hijau BWK II Kota Kupang sebesar 2727,5 Kg/Jam dan kemampuan daya serap RTH eksisting sebesar 1301,34 dan masih menyisakan sisa emisi sebesar 1426,16 Kg/jam, sehingga membutuhkan tambahan RTH sebesar 10,3Ha untuk dapat menyerap seluruh emisi yang dihasilkan dari sektor transportasi pada kawasan jalur hijau BWK II. Beberapa Strategi yang dapat dilakukan untuk memenuhi kebutuhan RTH di Kota Kupang adalah (1) Memadatkan RTH jalur hijau dengan cara memanfaatkan lahan kosong yang terdapat pada jalur hijau untuk menanam jenis-jenis vegetasi yang memiliki daya serap tinggi. (2) dengan menggantungkan spesies tanaman penyerap emisi pada pohon-pohon yang ada pada RTH jalur hijau dan menerapkan metode vertical garden,Roof garden dan tree adoption.

The Feasibility Study of the Revitalization of the Merdeka Field in Medan City is to obtain a Foundation of the Planning and Design Program regarding the Development of the Merdeka Field Area in Medan City that meets the needs of the community as a nationally viable public facility. The feasibility study of the revitalization of Merdeka Field in Medan used primary data and secondary data. In the feasibility study of the revitalization of Merdeka Medan Field, it was analyzed through spatial aspects through Medan City Bylaw No.1 of 2022 concerning Regional Spatial Planning (RTRW) and Medan City Zoning Regulations from 2022 to 2042. The result of the feasibility study of the revitalization of Merdeka Field Medan is that the concept planned for the revitalization of Merdeka Square is in accordance with the Regional Spatial Plan (RTRW) of the city of Medan by remaining a Green Open Space (RTH) that functions as a catchment area. In addition, the Merdeka Square area also provides Blue Open Space (RTB) which can function as a medium for water storage and prevention of flooding.