Enterprise Rent-A-Car will commemorate its 50th anniversary by pledging the unprecedented gift of 50 million trees to The National Arbor Day Foundation.

Enterprise has formed a partnership with the Foundation to plant 50 million trees over the next 50 years "a gift of more than $50 million"…

The U.S. Forest Service will help to plant these trees "one million of them each year" in National Forests located in the United States, Canada, and Europe to restore areas damaged by fires, storms, and disease, as well as to help expand and preserve habitats for endangered species.

The ceremonial first trees of the Pledge – several small White Pines – were placed in dirt last week by first lady Laura Bush to officially launch the program. The trees will be planted permanently in the Mark Twain National Forest in southern Missouri.

The Enterprise gift to The National Arbor Day Foundation is the largest in the charity's history. To put this gift into perspective, there are 25,000 trees in New York's Central Park. Planting 1 million trees a year is like planting a new Central Park every 10 days… for the next 50 years.

The rental car company reaches the 50 year milestone in February 2007. (Arbor Day Foundation Announcements)