Someone who considers the earth as a whole, and does not recognize them selves as coming from a specific country.
I am not an American. I am a Planetarian! A citizen of the world.
One who eats food that is lighter on the planet. One can be a meat eater or a vegetarian and still be as Planetarian as long as he/she pays attention to where food comes from and its overall footprint.
When I follow my Planetarian diet and pay attention to where my food comes from, I feel like I not only eat healthier but I also feel like I am giving the Planet a bit of a break.