Earth Then and Now 2011 Calendar

Our planet is in a constant state of change. From environmental shifts and natural disasters to urbanization and industrialization, the face of the Earth has transformed. In Earth Then and Now 2011, this collection of 24 before-and-after images reveals in stark contrast the radical and startling changes that have occurred in our world in the past century. Each month is a reminder of how quickly our planet can change, often in remarkable and ominous ways.