Author Birgit Penzenstadler provides an audio recording of the Requirements column, in which she discusses how the "Karlskrona Manifesto on Sustainability Design" is a call for discussion and action on the challenge of sustainability and its relation to software engineering. The manifesto aims to create common ground and develop a reference point for the global community of research and practice in software and sustainability. From IEEE Software's September/October 2015 issue: http://www.computer.org/csdl/mags/so/2015/05/index.html. Visit IEEE Software: http://www.computer.org/software.