E-commerce is currently one of the main factors in economy development. An increasing number of customers order products via the Internet because of lower prices, convenience, a wider range of products, etc. They expect these products to arrive at their destination, preferably as soon as possible, with the possibility of various forms of payment, free returns. This requires efficient supply chains that simultaneously encompass two opposing concepts: leanness and agility. However, there is a research gap because no empirical studies have been carried out into how these concepts are used in supply chains of e-commerce at the same time. The goal of this paper is to identify the nature of supply chains in terms of their lean and agile approach in the context of the type of product being moved (which can be sold via e-commerce), logistical solutions and supply chain management, and trends that shape the image of supply chains. The basic source of empirical materials was the author's survey.

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Sustainability and eco-friendliness of the chain of supply is a subject of interest among many researchers. New eco-friendly solutions are being implemented in production, storage, and transportation of the entire chain of supply. This study focuses on pro-environmental solutions related to warehouse management. The publication describes a project of installing a solar photovoltaic (PV) system to generate electric power at the H&W Warehouse in New Brunswick, New Jersey. The purpose of this publication is to demonstrate the financial and environmental benefits of using sustainable forms of energy. The environmental benefits were calculated from the perspective of lowering the amount of carbon dioxide (CO2) released into the atmosphere. The financial benefits were determined by calculating the net present value (NPV), internal rate of return (IRR) and profitability index (PI) as well as regular and discounted payback. A computer simulation was being used as the research method. Calculations included in the publication have proven that the project being considered is beneficial from the financial and environmental perspectives.