Decision making in contexts of deep uncertainty - An alternative approach for long-term climate policy

•There is a strong tendency to view IAMs as providing objective analysis.•Largescale reliance of IAM scenarios on CDR is problematic for a number of reasons.•Dependence on CDR is being baked into emissions targets without a public debate.•Polarisation on CDR could hinder progress on CDR and alternative strategies.•Approaches to allow diversity in value-sets in climate policy making is essential.