If additional ore resources are not discovered and rates of ore consumption remain the same,in about how many years will most of the resources listed here be exhausted? 
Definitions:
Dependents
Individuals who rely on others for financial support or care, typically within the context of a family or a close relationship.
Rational Choice Theory
An economic principle that states individuals always make prudent and logical decisions that provide them with the highest amount of personal utility.
Macro Level
Analysis or perspectives focused on large-scale structures and processes in society, often contrasting with micro-level individual or small group interactions.
Maximize Interests
The process of optimally increasing the benefits or gains from a situation or decision.
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