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It's the most cost competitive in terms of dollars spent per contaminant removed and that's simply because we've been able to generate such a high capacity for this toxic hydrogen sulfide, the other end that the customer really likes is that the other solid products that are out there are responsible for sending to landfill to get rid of, whereas with SufaCHAR we take it back and we redistribute it as an agricultural product, so it's cheaper and it has this great beneficial end use.