Celebrating its 40th anniversary in 2011, Greenpeace is the organization synonymous with peaceful environmental activism. And spotlighting the wilderness's most pristine landscapes and alluring faces, Greenpeace: Standing Up for the Earth calendar is a poignant tribute to the splendor, diversity, and fragility of the natural world. A humpback whale breeches off the Alaska coast. The astonishing fall colors of Great Smokey Mountains National Park. An intimate portrait of an orangutan holding her baby. Every month's image will stop you in your tracks. As always, royalties from the sale of the calendar support the work of Greenpeace.