It's big, it's nasty but it's more than just a hole in the ground. Puente Hills is Los Angeles' dirtiest suburb. Mammoth machines trundle around a pile of trash twenty stories high. Man and technology are pitted in battle against a tidal wave of waste. Some landfills take in 2,000 tons of trash a day but America's largest active dump takes in that amount each hour. Take a spin in the 120,000 lb Bomag Compactor with its 55-inch garbage crushing steel wheels. Puente Hills powers over 100,000 homes and a fleet of vehicles with the landfill's methane gas. Sift through the gargantuan world of garbage and find out what happens to your trash when you're not looking.