The article evaluates the environmental impacts of an oil tanker throughout its life cycle using a method called Life Cycle Assessment (LCA). The researchers divided the tanker's life cycle into five phases and used a specific methodology to assess its environmental performance. The study found that the operation phase of the tanker, which involves consuming a lot of fuel, has the biggest impact on emissions and the environment compared to other phases. This research provides a detailed example of how LCA can be used to analyze the environmental impact of ships, which can be helpful for future studies in the shipping and shipbuilding industries.