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Amidst a progressively intricate and constantly evolving corporate landscape, the performance of employees holds significant significance in attaining organisational triumph. The correlation between leadership style and the degree of motivation in the work environment has a substantial impact on the quality and productivity of employees. The objective of this study is to ascertain the impact of leadership style and motivation on employee performance in the workplace. For this study, we employed a thorough literature review as our research methodology, gathering pertinent and current information from relevant scholarly articles, journals, and books. Empirical evidence demonstrates that the manner in which leaders lead and the level of motivation present in the work setting exert a substantial impact on enhancing employee performance. This knowledge provides a valuable foundation for the development of more efficient leadership methods and motivating programs that can be implemented in the workplace.

This study aims to analyze the effect of Liquefied Petroleum Gas (LPG) fuel on the performance (torque and power) and exhaust emissions of a 125 cc Supra X 125 motorcycle (2010 model). An experimental method was applied by testing the engine using two types of fuel, namely gasoline and LPG. The independent variable in this study is the type of fuel, while the dependent variables include torque, power, and exhaust emissions consisting of carbon monoxide (CO), hydrocarbons (HC), and carbon dioxide (CO₂). The tests were conducted at various engine speeds (RPM) using a dynamometer, while emission measurements were analyzed using a gas analyzer.The results show that LPG fuel produces slightly lower torque and power compared to gasoline, especially at low to medium engine speeds. This is attributed to differences in calorific value and air–fuel mixing characteristics. However, at higher engine speeds, LPG shows more stable performance. In terms of emissions, LPG significantly reduces CO and HC emissions, while CO₂ emissions slightly increase, indicating more complete combustion.It can be concluded that LPG has potential as a cleaner alternative fuel, despite a slight reduction in engine performance.

PT. Varia Usaha Beton Sidoarjo is a manufacturing company that produces concrete products and provides services, where the products produced definitely produce a high environmental impact. The application of environmental accounting itself is needed to support the company's operational activities to identify, measure, evaluate and report environmental accounting as control over the responsibility for negative impacts from the company's operational activities. The triple bottom line concept is also a theory that looks not only from the profit aspect but also from the people and planet aspect.  This research aims to find out how environmental accounting is implemented in relation to the triple bottom line concept towards a green economy in order to achieve sustainability at PT. Varia Usaha Beton Sidoarjo.  This research uses a qualitative descriptive research design with a case study approach.  The data in this research was obtained from observations and interviews by researchers with parties related to the research.  Based on the results of research at PT. Varia Usaha Beton, it is known that the company has implemented environmental accounting, but the recording carried out does not yet have a separate account.  The company has been responsible for managing and minimizing environmental costs to improve company performance, which is related to the triple bottom line concept towards a green economy in order to achieve company sustainability through managing waste and the products produced.