PBS: SPENCER MICHELS: Each year, Americans throw away about 250 million tons of garbage. That's roughly four pounds per person per day.
You can find all manner of trash in a landfill, old bent music stands, plastic bags, and a lot of items that could have been recycled, like bottles and cardboard. Beyond the obvious blight they cause, landfills create environmental damage and emit harmful greenhouse gases. They are monuments to waste.
Those concerns have prompted San Francisco and a handful of other...