Well, on the acid gas emissions, the regulations, in a lot of cases, have driven whether these plants are retrofitted or not.
Right now, we understand that carbon dioxide is an issue. We sell coal. We're not in the power business. But we recognize that our customers do have the issue.
We try to keep our costs down and keep our coal prices within reason. It's a commodity, a long-term contract, within the country. But ultimately, we see being able to assist the industry by making a separate business case whereby we're going to gasify coal for another reason.