People migrate for many different reasons. These reasons can be classified as economic, social, political or environmental: ... political migration - moving to escape political persecution or war. Environmental causes of migration include natural disasters. Sometimes you are forced to move for a better life.
This poster belong to
Freedom of Movement

In last year's brief we talked about "a world where boundaries are becoming less and less meaningful. Now more than ever, we are one people. No matter where we live, we are all equally powerless in the face of war or environmental disaster."