Add Yahoo as a preferred source to see more of our stories on Google. Stacks of old bricks against an outdoor plastered wall. - Fotandy/Getty Images Composting is one of the best things you can do for ...

At the recycling center, powerful magnets will pull out steel. Spinning drums will toss aluminum into bins. Copper wires will get neatly bundled up for resale. But as the conveyor belt keeps rolling, ...