This Briefing Paper is a technical level description of how the carbon content of construction products and their packaging is considered in Environmental Product Declarations (EPD). The carbon content of a construction product is not the same thing as the embodied carbon of a construction product (see separate Introductory Briefing Paper), they are different concepts measured differently. There is however a relationship between them and this Briefing Paper discusses how carbon content is considered in an Environmental Product Declaration (EPD) from a technical perspective.