The ‘ Common Carbon Metric’, supported by UNEP , has been developed for

The correct answer is Option 1: assessing the carbon footprint of building operations around the world.

Explanation:

The Common Carbon Metric (CCM) is a standardized methodology developed by the United Nations Environment Programme's Sustainable Buildings and Climate Initiative (UNEP-SBCI). Its main objective is to measure, report, and verify energy consumption and greenhouse gas (GHG) emissions associated with the operation of building stock around the world.

Buildings contribute significantly to global energy consumption and greenhouse gas emissions. The Common Carbon Metric provides a consistent, universally applicable protocol for baseline measurement, allowing governments, organizations, and building operations globally to track and reduce their carbon footprint effectively.