Sustainable development requires societies to consider economic prosperity, social well-being and environmental limits together. Economic growth can improve living standards, but growth that depletes natural resources or creates severe pollution may undermine future welfare. Conversely, environmental protection that ignores poverty and livelihoods may be difficult to sustain politically and socially. Sustainable development therefore involves choices about how resources are used, who receives benefits and who bears costs. Intergenerational equity adds another dimension: decisions made today can affect the opportunities available to people in the future. This does not mean that every resource must remain untouched. Rather, it calls for responsible management, technological innovation and institutions capable of balancing competing objectives. Sustainability is consequently better understood as a continuing process of negotiation and improvement than as a fixed condition that a society reaches once and for all. Question: Which factor is NOT presented as part of sustainable development?