A service provider has a partnership with the telco operator and instantiates applications in different Edge Cloud data centers of the telco operator. These application instances, altogether, provide a service offered to end users that are also subscribers of the telco operator. The service, with this configuration, offers better network performances to the end users. The service provider wants to know the E2E energy consumption and CO2 emission of its service in a certain period of time. A system of the service provider invokes the EFN API to get the above-mentioned information. The reported energy consumption and CO2 emissions consider the energy used to run the instances of those applications in the data centers and the energy consumption along the network to provide the service (e.g. RAN and core network consumption) in the specified period of time. As a short summary there are the following use cases:

• Environmental Impact Monitoring: Allows API consumers to track the energy consumption and carbon footprint of their services.
• Sustainability Reporting: Helps telco operators report on their environmental impact.
• Energy Optimization: Enables operators to identify high energy consumption areas and optimize accordingly.
• Green Initiatives: Supports initiatives aimed at reducing greenhouse gas emissions.
• Regulatory Compliance: Assists in meeting regulatory requirements for energy consumption and emissions reporting.

A service provider can be aware of the energy consumption and carbon footprint of its service and leverage his marketing on that information. The telco operator can demonstrate the energy efficiency of its network and cloud platforms. Operational efficiency for the API customer (cost savings) is also benefit.