In most auto factories, the leftover steel cutouts are stacked up, then sold to a foundry, where they are melted with other bits of steel and converted into scrap metal.

FORBES: How GM Makes $1 Billion A Year By Recycling Waste

Blue Star Steel saves money buying scrap steel, and the environment is spared additional greenhouse gas emissions from a foundry.

FORBES: How GM Makes $1 Billion A Year By Recycling Waste