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be applied to world oil supplies. When do you think world oil
production will reach its peak—or has it done so already?
Can you offer an explanation for this remarkable concentration? If
you were part of a team of exploration geologists looking for large
copper deposits, where would you focus your search?
Given that we are now dependent on nonrenewable resources of
energy and minerals, and that the world's population continues to
increase, how do you think human societies will adjust in the future?
Do we have a resource problem or a population problem (or both)?
Some people think that sustainable development is not a useful
concept, because it may be impossible to implement—or even to
define—in the case of nonrenewable resources. Others think that it is
an extremely important concept, if only because it makes us think
about the needs of future generations in planning resource
management. What do you think?