Are you a restaurant owner/manager or know someone who is?
Check out this article on the SF Chronicle and learn what FOG is and how you can get rid of it. What's more, the SFPUC can turn it to biofuel! Click on the following title to read the article: S.F. asks eateries to trap grease, save sewers.
You sure would want to trap your grease, or else, as you will see on the photo below, we'll all end up with concrete-like hardened grease clogging our sewer pipes!