Green Printing using Soy Ink

I'm glad that the issue about plastic bags was finally given attention.  Our city's goal now is to go green.  Plastic bags are not allowed anymore.  Well, it's not a total ban because you can still buy them if you really want to use plastic bags.  But once people get used to it, I'm sure they would eventually forget about using plastics.  Even companies are supporting the drive.  My uncle's printing shop is also implementing green printing.  They are now using environment friendly inks and papers.  I say friendly because the inks used are from soy and the papers are recycled.