What type of energy efficiency method could be applied to obtain points under green power?

The correct choice is rooted in the concept of procuring renewable energy through structured agreements, particularly long-term energy contracts. By implementing a 5-year energy contract, a project commits to purchasing a specific amount of renewable energy over a set period. This action not only promotes a stable demand for renewable energy sources but also strengthens the case for reducing reliance on fossil fuels, which is a key objective within LEED's framework for green power credits.

Long-term contracts provide a financial foundation that supports the development and continuation of renewable energy projects. Such contracts can help secure pricing stability and showcase a serious commitment to sustainability—both of which are crucial for obtaining points under green power initiatives in the LEED certification process.

In contrast, annual maintenance audits focus more on operational efficiency rather than energy procurement, while calculating ongoing energy usage addresses performance tracking but does not directly engage with renewable procurement. Reducing carbon footprint is broadly related to sustainability practices but does not specifically align with obtaining points directly connected to green power procurement strategies. Therefore, entering into 5-year energy contracts stands out as the most aligned method for achieving recognition within LEED's green power framework.