I was checking out the Women’s Art Caucus site today when I came across this call for entry:
Art for Change Around the World
Women’s Caucus for Art/United Nations Millenium Goals
Postcard call for entry: Sustaining Our Environment
Submit 4×6 or Size 6 postcards made from recycled materials on the theme of “Sustaining our Environment.” Full submission details can be found here
This call for entry appears to be open to all artists around the world.
You can view some of the postcards on the blog WCA ArtWaves International