What does lifecycle emissions mean in evaluating energy projects?

• A. Total greenhouse gas emissions from construction through decommissioning.
• B. Emissions from fossil fuel extraction only.
• C. Emissions during startup.
• D. Emissions only during operation.

Answer: (A)

Lifecycle emissions cover all greenhouse gas releases tied to an energy project over its entire life, from building and installing the facility through operation, maintenance, and ultimately decommissioning and end-of-life disposal. This comprehensive view includes emissions from making materials (like steel, concrete, panels, turbines), transporting them, constructing the plant, ongoing energy use and maintenance during operation, and the processes involved in decommissioning. Because it accounts for every stage, it provides the full climate impact of a project, not just a single phase. That’s why describing total emissions from construction through decommissioning is the best answer. Emissions from only extraction, only startup, or only operation miss parts of the life cycle and can mislead comparisons between technologies.