Together these choices ensured 198consistency with the Integrated Assessment Model (IAM) benchmarks reported in WGIII and were closely focused 199on direct anthropogenic emissions under the UNFCCC, reflecting the importance of human-driven technology and 200policy options in shaping the future climate response.

Incorporating SMR principles into the macroeconomic modules of integrated assessment models would strengthen their ability to comply with thermodynamic principles and more systematically take feedbacks between different resources into account

IAMs are comprehensive and detailed tools to analyze feedbacks between socioeconomic andearth systems, butmostly do not include an explicit representation of society’s biophysical basis and its underlying thermodynamic principles1

Efforts to incorporate, even in a limited way, some of these issues and introduce moresevere damage functions and different assumptions on technology or distribution generatemarkedly different conclusions about the optimum trajectories.

the world has been much morefocused than the IAMs on a different set of issues, the risks of catastrophic consequences.These potentially catastrophic risks are in large measure assumed away in the IAMs.

The word "iambic" refers to the type of foot that is used, known as the iamb, which in English is an unstressed syllable followed by a stressed syllable.