
Their impacts on wellbeing and economic development are complex due to their interplay with national regulations and internationally negotiated treaties. Our rapidly expanding resource use has created environmental impacts that present us with the most challenging agendas for the 21st century. Proceeding with existing production methods and consumption habits, exacerbated by the ever increasing global engines of growth, will further erode our scarce resources increasing pollution, contributing to and creating global economic instabilities. Hence, transformative solutions to low-carbon resource production combined with demand reductions will need to be at the core of our policies, not only to address resource scarcity but also the impact of our changing climate.
To fully understand how energy, water, waste and food flow within and through our cities we need to consider not only their quantities, but also the reasons for their movement (what is causing their demand), who is paying for them and who controls them. In this way we not only understand how an energy source such as oil moves into, around and out of cities, but also what forms it takes (e.g., gasoline), what those forms are used for and hence how it is consumed (e.g., to power cars) and why the demand for those forms exists (e.g., to travel to work).
We must also understand the need for these resources in the first place, how locally controlled resources increase (or otherwise) resource security, the need for and use of local materials, and alternative paradigms for resource security.