What should the definition of sustainable energy be like if it is to be accepted by and useful to political scientists, spatial planners and earth scientists alike?

Step 1: Disciplinary
1. What elements are required for the definition of sustainable energy to be acceptable as well as useable by political scientists?
  1. Which elements spark debate within political sciences?
2. What elements are required for the definition of sustainable energy to be acceptable as well as useable by spatial planners?
  1. Which elements spark debate within the discipline of spatial planning?
3. What elements are required for the definition of sustainable energy to be acceptable as well as useable by earth scientists?
  1. Which elements spark debate within the discipline of earth sciences?
Step 2: Interdisciplinary
1. a) Which elements in step 1 overlap, and which conflict?
  1. To what extent are the conflicts irresolveable? Can the elements given in step 1 be modified to be acceptable after all?
2. b) How can the elements found at step 1 and modified at step 2 be combined to give a definition of sustainable energy that is acceptable as well as useful in the aforementioned disciplines?