U.S. Army Colonel (ret) Dan Nolan was one of the first of a growing group of army officiers who have beeen pushing the military to go green as part of national security. They are known as "the green hawks". While in the military, Dan was a principal advisor to General Tommy Franks. He also commanded the 1st Armored Division Artillery. Dan is a graduate of the United States Military Academy West Point.

Mariel Hemingway, is the granddaughter of the illustrious author Ernest Hemingway. At just thirteen years old, Mariel became famous in her own right as she made her feature filmdebut in Lipstick. Four years later, she earned an Oscar nomination for her role in Woody Allen's film Manhattan. She is the author of Mariel Hemingway's Healthy Living from the Inside Out. Her new book is Mariel's Kitchen: Simple Ingredients for a Delicious and Satisfying Life.