L.A. is home to America 's largest landfill site , almost as high as a city . Americans dumped 100 million tons of garbage in 2010 , most ends up as landfill . But there is complex science behind a garbage dump and it is safe and sustainable .
L.A. is home to America 's largest landfill site , towering as high as a skyscraper . Americans accumulated 250 million tons of garbage in 2010 , most ends up as landfill . But there is complex science behind a rubbish dump ensuring it is safe and sustainable .