6. A majority of the world’s population lives in cities

7. Human impact on the environment is largely mediated through urban infrastructure systems

16. Increased land is converted to agricultural production

17. Increased fertilizer use

47. no single simulation can satisfy all user needs

48. support interoperability and reuse among DoD simulations

49. federations of simulations (federates)

50. pure software simulations

51. human-in-the-loop simulations (virtual simulators)

53. Object Model Template (OMT) defines the format for specifying the set of common objects used by a federation (federation object model), their attributes, and relationships among them