How much parking space does one Wal-Mart need?

A lot, the giant company apparently thinks.  But not as much as they think, say the facts:

12:30 pm, Buncombe County, south of Asheville, NC, last week (August 6)

For a startling depiction of the company's spread across the American landscape, see my colleague Ian Wilker's post on the OnEarth site.  Still, Wal-Mart is all about being green.  Right?