This study evaluates the effectiveness of the CO2 Performance Ladder (CO2 PL) in reducing CO2 emissions, both at certificate holding companies and in the supply chain. It builds on the findings of a previous literature review of evaluations of the CO2 PL.
The evaluation was conducted by a survey of 488 CO2 PL certificate holders (39% of all participants), six case studies with interviews, a survey of a control group of 97 companies that are not certificate holders, and a workshop with ten certified companies.
The main conclusions are:
The added value of adaptation of the CO2 PL is highest for companies, sectors, and regions that have little insight in their emissions. There, the CO2 PL can be used to provide insight and set targets for reducing emissions. A standardised central database (especially on Scope 3 emissions) would make it possible to analyse absolute emission reductions and validate the theory of change.
Most companies are either certified at Level 3 or at Level 5. Currently the CO2 PL has five certificate levels. We recommend simplifying the CO2 PL to two levels.