Our existing and future indebtedness may limit cash flow available to invest in the ongoing needs of our businesses, which could prevent us from fulfilling our obligations under our senior notes, ABL Facility and other debt, and we may be forced to take other actions to satisfy our obligations under our debt, which may not be successful.

The closure of an operating facility or mine entails substantial costs. If our assumptions underlying our accruals for closure costs prove to be inaccurate or we prematurely close one or more of our facilities or mines, our results of operations and financial condition would likely be adversely affected.

We are subject to extensive governmental regulation, which imposes potentially significant costs and liabilities on us. Future laws and regulations or the way they are interpreted and enforced could increase these costs and liabilities or limit our ability to produce our raw materials and products.