First of all, if you have a co-product that you can use to generate your own electricity or meet your own energy requirements, that's great.
In the chlorine/chlor-alkali chemistry business, a by-product is hydrogen, and for many years that was vented to the atmosphere. It causes no environmental harm and it's a very abundant element in the earth's atmosphere, but with the push on for energy efficiency and other related activities, that hydrogen is all captured now and consumed on the sites to give them their own heat and power.
Otherwise, people are very active in combined heat and power. They are very efficient plants, compared to delivering electricity off the grid or combusting their own fuels in an old-fashioned type of boiler.
In terms of other alternative fuels, that would be more the Renewable Fuels Association and what they do in ethanol plants. We get a lot of questions about the ethanol industry and the biodiesel community, but we don't represent them. They're not in our areas of chemistry, let's say.