The costs of providing for pension benefits and related funding requirements are subject to changes in pension fund values and fluctuating actuarial assumptions and may have a material adverse effect on our consolidated financial condition, results of operations and cash flows.

If we do not appropriately estimate landfill capping, closure, post-closure and remediation costs, our consolidated financial condition and results of operations may be adversely affected.

We may be unable to obtain or maintain required permits or to expand existing permitted capacity of our facilities, which could decrease our revenue and increase our costs.