Resource extraction companies (oil, mining, etc..) usually are required to post security for reclamation. However, large companies are permitted to not post ca

Resource extraction companies (oil, mining, etc..) usually are required to post security for reclamation. However, large companies are permitted to not post cash or bond, but on their word (credit). Which works while commodity prices are high. But when prices crash, so do the companies and society (the tax payer) is left holding the bag for cleanup.