Product carbon footprint is defined as the various Greenhouse Gas (GHG) emissions of a product in its whole life cycle, that is, the GHG emissions in all stages from raw materials to production, distribution, use and disposal/reuse, expressed as CO₂e. The process of measuring the carbon footprint of various products in their whole life cycle can help companies to collect the information they need, so that they can: reduce various GHG emissions, identify opportunities for cost saving, integrate the impact of emissions into decisions on supply, material, product design, manufacturing and other processes, and present their leadership in environmental responsibility or corporate responsibility in order to meet the needs of customers for carbon footprint information.

PAS 2050 Specification for the Assessment of the Life Cycle Greenhouse Gas Emissions of Goods and Services is the world's first method standard for the product carbon footprint. The purpose of the standard is to help enterprises to manage their own greenhouse gas emissions generated in the production process, while looking for opportunities to reduce greenhouse gas emissions in the process of product design, production and supply.

CTI (Centre Testing International Group Co., Ltd) Certification can carry out the gap analysis and verification of carbon footprint accounting for enterprises according to PAS 2050 standard. CTI certification has purchased professional SimaPro 9.0 carbon footprint calculation software and Ecoinvent database, which can provide accurate carbon footprint accounting for enterprises, and provide high-quality services for enterprises to meet the requirements of export market and continuously improve the carbon emission of products.