What can Brown do for you? For a start, it's making your world greener by using cleaner burning biodiesel. The United Parcel Service began using biodiesel blends at its most vital hub in Louisville, Ky., last month.

UPS recently installed a biodiesel fuel tank and fueling station at its Worldport facility. It will allow fueling operators to blend specified percentages of biodiesel "on the fly," starting with 5 percent biodiesel (B5), and working up to 20 percent biodiesel (B20).

The single most important point in all of UPS's global operation, Worldport processes 416 thousand packages an hour, turns 100 aircraft a day and is the size of 80 football fields.

The 30,000 gallon biodiesel tank and station at Worldport fuels nearly 200 vehicles and diesel-fueled equipment, most of which are used to load packages on and off the planes.

The National Biodiesel Board called UPS's switch to biodiesel monumental.

"For a giant like UPS to use biodiesel is not only an outstanding vote of confidence for biodiesel, but an example of how America's first advanced biofuel will fuel the drive towards genuine corporate sustainability," said Joe Jobe, CEO of the National Biodiesel Board.