Response 2: Challenging the scope?
© 2018 selection and editorial matter, Mike Hazas and Lisa P. Nathan; individual chapters, the contributors. The three chapters in Part 2 seem to challenge in different ways the scope of sustainable HCI. Nardi and Ekbia prompt us to consider the bigger picture framed through political economy, to better choose important problems to focus on, to communicate our work through scientific logic, and to consider technology that may become useful only in future sociopolitical scenarios. Joshi and Cerrato Pargman review definitions of the term "sustainable" within sustainable HCI and beyond. They then leverage that review to analyze user perceptions of a commercially available smartphone designed with the ambition of being sustainable. Penzenstadler and Venters put forward a methodology, comprising two conceptual tools, to take account of sustainability within software engineering, and especially requirements engineering.