Purpose – Show the prospective methodology as a tool to generate strategic knowledge for the design of sustainable futures. Design/methodology/approach – Prospective Strategic is a Social Science discipline dedicate to explore the future. Based on qualitative methods whit participative stakeholders’ permits design different future options and planning the transformation from actual scenario to desired future. We propose a four stages methodology process for the design sustainable futures: first understanding the context, followed by a strategic visualization, to continue the stage design the alternative sceneries and define the desired future, and finally concludes planning its construction. Originality/value – This methodology puts in evidence the possibility of seeking alternative scenarios for a sustainable future in different ambits. Particularly we resume three prospective applications: biodiversity conservations and treatments water. Practical implications – The outcomes of the application have been allowed to propose strategies and policies for environmental goods management such as environmental services and reuse water, with a long time vision based on a collective desiderated future.