sulphur dioxide, by the way, is the problem in coal and carbon dioxide. the next coal-cleaning method i want to talk to you about is called gasification. it basically converts the coal into a gas by blasting it with steam and oxygen, so coal is a solid. and you re making it into a gas. with coal in gas form, it s actually easier to filter out the by-products that are bad for the environment. and then this is the most this is one that a lot of people talk about. the president even talks about this one. carbon capture and seque sequestration, it s capturing something and holding it. let me put it in layman s terms, you capture the carbon dioxide, and let s say you capture it and you send it down here and you pipe it underground and you bury it. according to the department of civil and environmental engineering at the uvermt of utah, there are more than 150 projects under way in the united states that involve carbon sequestration. there are issue was this as well, though. a lot of peopl