A costing approach that includes the disclosure

of any foreseeable expenses and liabilities which are specified under generally

accepted accounting practices

A full cost approach that includes the legal

clean up and the rehabilitation costs for maintaining the sustainability of the

resources

A full cost and benefit approach that includes

the consuming of essential natural resources and effectively internalises as

many externalities as is possible

A costing approach that includes the disclosure

of specific liabilities and expenses which are subject to legal inquiry