The Ariadne project shows ways in which the climate goals can be achieved. The focus is on research for energy transition strategies, their systemic effects, and which sectoral interactions arise as a result. The project investigates policy instruments to help achieve climate goals in an efficient and socially balanced way. With the help of evidence-based assessments, the scientific basis for shaping the energy transition is to be expanded and any learning processes in politics and science are to be triggered.

The policy brief discusses the different policy pathways to reach the climate target, as presented in the EU Commissions Impact Assessement of the 2030 target plan. There are different ways how the EU can reduce emissions to -55%: mainly through tighter regulation and standards, primarily via carbon price or trough a mix of both. The policy mix route may seem most attractive: politically, it is the path of least resistance, as it continues on the current trajectory. And it promises the best of both worlds – the efficiency of carbon pricing and the certainty of regulatory approaches. At the same time, the mix has some conceptual arguments in favor: companion policies, like standards and infrastructure investment, ensure that consumers have more climate-friendly options to choose from and bring down their cost. Thereby, they make it easier to stomach higher carbon prices.