Ford is motoring into the junk business with a plan to acquire auto dumps across North America and build a massive international car parts recycling company that sells its wares over the Internet. The move is intended to generate $1 billion a year in revenue while following Ford Chair William Ford Jr.’s pledge of environmental responsibility. William Li, chief operating officer of the new enterprise, says Ford wants to increase the amount of a junked car that is recycled to 95 percent, up from the current average of 80 percent.