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

• assessing the carbon footprint of building operations around the world
• enabling commercial farming entities around the world to enter carbon emission trading
• enabling governments to assess the overall carbon footprint caused by their countries
• assessing the overall carbon foot-print caused by the use of fossil fuels by the world in a unit time

Answer: a) assessing the carbon footprint of building operations around the world

Notes:

• Carbon footprint of an entity is the total amount of greenhouse gases that are generated by that entity. 
• The Common Carbon Metric is a protocol developed by United Nations Environment Program’s Sustainable Buildings & Climate Initiative (UNEP-SBCI) for measuring energy use & reporting GHG emissions from Building Operations.  
• Its purpose is to support greenhouse gas (GHG) emissions reductions through accurate measurement of energy efficiency improvements in building operations.