It’s 45 years since astronauts on board Apollo 17, the last mission to the Moon, took one of the most famous and reproduced photographs in history - the Blue Marble image of the entire Earth.  Now current astronauts reveal the astonishing changes in Planet Earth since then – on such an epic scale that they are visible from orbit. This film reveals how humans have etched their presence on Earth by the changes we have made, to meet our needs for food, water, energy, and safety.