The current state of the environment is alarming for future generations, and this is the purpose of initiating practices to preserve environmental sustainability. An initiative such as "Green Shipping" implies a concept, a program with the purpose of reducing or negative effects, the impact of maritime shipping on the environment. "Green ship" is any marine vessel that in some way contributes to the improvement of the existing state of the environment. GPS or Green Shipping Practice can be defined as an environmental management practice undertaken by shipping companies, with a strong emphasis on reducing waste during operation, and also conserving resources in the handling and distribution of cargo and products. The development of green ports is one of the ways to manage a protected environment. Green port or green port, known as an ecological port, is today defined as a port of sustainable development, which not only meets environmental requirements, but also increases their social, economic interests. The priority is to integrate environmentally friendly methods in the port. Based on the analysis of the work, it is possible to conclude the importance of using renewable energy sources that are not harmful to the environment and living beings.