Stuart Walker (ImaginationLancaster, Lancaster University) opened his presentation by stating that he is interested in looking inside and re-conceptualizing the nature of our material culture in order to create more sustainable and meaningful (not just disposable, exploitative and damaging) approaches. Walker explained that propositional design is concerned with exploring the nature and aesthetics of functional objects in relation to sustainability and understandings of substantive meaning, where particular function is not a primary concern. He claimed that his take on sustainability orientates around economic viability, environmental care and social responsibility. Walker argued that as 90% of plastics and 90% electronics go to landfill, environmental issues of resource use, energy use, pollution and waste, as well as social issues of social inequity, exploitative labour practices and effects of use (value, meaning etc) are at the forefront of his interest as a designer. He also emphasised that approaching this topic through a historical perspective of pre-industrial and industrial stages, sustainable future is difficult to conceptualize.