okay, we re heading over to the cooker. here we go. reporter: bob kohn, a small pig farmer, tons and tons of food waste, from many of the major casinos. it all ends up here, on combs 150-acre farm. we are going, all right? reporter: with his newly built boiler, in just two hours, combs can turn ten tons of buffet leftovers into nutrient-rich pig feed, and just like that, bright-light city to the south, this is a 24/7 operation. i work it, yeah. pigs can outrun me now, most of them can. reporter: his farm is a shrine to conservation. even the pens themselves are made from recycled world war ii landing mats.