Perubahan iklim di sebabkan oleh kenaikan gas karbon dioksida (CO2) semenjak era revolusi industri dimana hal ini dicirikan dengan adanya peningkatan suhu, paras muka laut, perubahan pola curah hujan serta meningkatnya kejadian ekstrim seperti banjir, kekeringan, gelombang panas dan badai. Fenomena ini akan berdampak serius apabila berlangsung secara terus-menerus. Blue carbon (karbon biru) merupakan karbon yang diperangkap dan disimpan melalui proses fotosintesis oleh organisme autotrof dalam bentuk biomassa dan sedimen oleh ekosistem pesisir dan laut. Mangrove merupakan salah satu dari eksosistem sebagai blue carbon tersebut. Mangrove Register 15 merupakan suatu kawasan mangrove yang berada Kecamatan Pasir Sakti, Kabupaten Lampung Timur, Provinsi Lampung. Penelitian ini bertujuan menganalisis karbon tersimpan pada tegakan, nek romassa, serasah, dan substrat mangrove. Penelitian dilakukan dari bulan Maret–Mei 2021. Hasil penelitian menunjukkan karbon tersimpan pada sedimen lebih besar dibandingkan dengan karbon tersimpan pada tegakan, nekromassa, dan serasah. Karbon tersimpan pada sedimen yang tertinggi berada pada sedimen yang memili ki ukuran liat kasar karena liat kasar dapat menyimpan unsur hara yang tinggi.  Climate change is caused by an increase in carbon dioxide (CO2) gas since the industrial revolution era where it is characterized by an increase in temperature, sea level, changes in rainfall patterns and increased extreme events such as floods, droughts, heat waves and storms. This phenomenon will have a serious impact if it continues. Blue carbon is carbon that is trapped and stored through the process of photosynthesis by autotrophic organisms in the form of biomass and sediment by coastal and marine ecosystems. Mangroves are one of these ecosystems as blue carbon. Mangrove Register 15 is a mangrove area located in Pasir Sakti District, East Lampung Regency, Lampung Province. This study aims to analyze the carbon stored in stands, nec romassa, litter, and mangrove substrates. The study was conducted from March–May 2021. The results showed that carbon stored in sediments was greater than carbon stored in stands, necromass, and litter. The highest carbon stored in sediments is in sediments that have the size of coarse clay because coarse clay can store high nutrients.

This study aims to determine the effect of murabahah financing income, istishna financing income both simultaneously and partially on profitability. The object of this research is PT. Bank Muamalat Indonesia TBK with a research period in 2006 to 2019. The method used in this study is a quantitative method with multiple linear regression techniques. Analysis techniques using multiple linear regression include the classic assumption test, the regression equation test and hypothesis testing. In data analysis using assumptions, the independent variable is murabahah financing income (X1), istishna financing income (X2) with the dependent variable is Return On Assets (Y). The results showed that simultaneously murabahah financing income and istishna financing income could explain or explain ROA of 44.1%, the rest was influenced by variables or other factors of 55.9%. While partially, murabahah financing income variable has a significant negative effect on ROA at PT. Bank Muamalat Indonesia TBK. Istishna financing income variable has a significant positive effect on ROA at PT. Bank Muamalat Indonesia TBK.

Penelitian ini bertujuan untuk mengetahui pengaruh literasi dan tingkat religiusitas terhadap minat berwakaf tunai pada masyarakat kabupaten Bima. Data dan informasi yang digunakan dalam penelitian ini menggunakan data primer yang diperoleh dari hasil pengisian kuesioner. Jenis data yang digunakan adalah kuantitatif dan menggunakan metode analisis regresi linier berganda dengan teknik pengambilan sampel menggunakan Simple Random Sampling. Hasil penelitian menunjukkan bahwa variabel literasi dan religiusitas masing-masing memiliki pengaruh yang signifikan terhadap minat berwakaf tunai pada masyarakat kabupaten Bima.

Islam strongly advises against investment, as mentioned in lines 46–49 of the Surah Yusuf. The Islamic stock market, which offers Islamic stocks as one of its components, is one place where somebody can invest. Several macroeconomic and microeconomic factors, as well as equity investment, have an impact on Islamic stocks. This study examined the impact of inflation, exchange rates, and the BI Rate on the Indonesian Sharia Stock Index (ISSI) throughout the years 2017–2021. Statistical data on the market capitalization of the Indonesian Sharia Stock Index (ISSI) given at the Financial Services Authority (OJK), as well as other variables like inflation, currency rates, and the BI, were used in the quantitative research technique. Analysis of the research data was carried out through multiple linear regression modeling. The results showed that the Inflation variable (X1) had no effect on the Indonesian Sharia Stock Index (ISSI), the Exchange Rate variable (X2) had a significant negative effect on the Indonesian Sharia Stock Index (ISSI) and the BI Rate variable (X3) had an effect significantly positive to the Indonesian Sharia Stock Index (ISSI). The macroeconomic variables used in this study have an impact on the movement of the Islamic stock index, which causes the movement of the ISSI to vary quite a bit.

Development in Indonesia is a complete human development, namely development in all fields, considering that economic development and development in general and especially development in the business sector is increasing, unhealthy business competition will inevitably arise both between one business actor and another business actor and between business actors and consumers. One of the business entities engaged in these services is the Regional Drinking Water Company (PDAM) which is a business entity engaged in clean water supply services. Where related to its grievances as a business entity oriented towards profit-oriented on the one hand, and protection of consumers on the other hand is a juridical issue that needs to be considered. The legal relationship that arises between PDAM business actors and consumers as users of water services is a legal relationship born from contractual, where the type of contractual is a standard contract or standard contract, by looking at the concept of a standard contract, it can be seen that the position of one of the parties, in this case, the consumer is in a very weak position because consumers are only given two choices, namely agreeing or disagreeing with the contract. Some PDAMs issued a unilateral tariff increase policy and imposed new tariffs that experienced a significant increase from the old tariff provisions. This tariff increase is considered a unilateral policy so the position of consumers as users of water services in standard contracts is greatly harmed by the unilateral tariff policy. The formulation of the problem in the paper is How is the legal protection of consumers for unilateral tariff determination by PDAM? Based on the results of the study, consumer legal protection for tariff determination carried out unilaterally in standard contracts by PDAMs is regulated in Law Number 8 of 1999 concerning Consumer Protection and Permendagri Number 23 of 2006 concerning Technical Guidelines and Procedures for Regulating PDAM Drinking Water Tariffs. Based on Law Number 8 of 1999, consumers can file a lawsuit civilly with the District Court (PN) or the Consumer Dispute Resolution Agency (BPSK) based on a legal relationship born of contractual origin. Meanwhile, based on Permendagri Number 23 of 2006, if the decision of the Regent and/or Mayor regarding the tariff increase is contrary to Permendagri Number 23 of 2006, it can be sued for cancellation of the decree in the State Administrative Court (PTUN).