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Global biosphere issues call for an education for sustainable consumption decisions. Enabling adolescent learners to form sustainable consumption intentions involves an understanding of underlying internal predictors. The theory of planned behavior (TPB) delivers a useful approach to this challenge. Understanding of the underlying motives behind sustainable consumption decision-making, however, requires knowledge and evaluation of three basic sustainability aspects, the generational, the coherence, and the spatial aspect. As yet, the TPB framework does not take account of those facets. In this paper, we propose an extension of the TPB that meets these shortcomings by integrating the sustainability aspects while including the concepts of sustainability knowledge and sustainability values into the existing model. Furthermore, we extended the functional range of the attitude construct to the three sustainability aspects. The objective of the present article is to introduce and discuss the adapted framework which can serve as a first step for an educational implementation of the concept of sustainable consumption.

Consumption-Intention Formation in Education for Sustainable Development: An Adapted Model Based on the Theory of Planned Behavior