What would happen to Earth if all humans died? BBC Worldwide's "Earth Unplugged" made a video attempting to answer this hypothetical question.
It looks into what would happen to everything from domesticated animals and plants, parasites that feed on humans, to man-made objects like cities, subways and damns.
This video inadvertently demonstrates the overwhelming environmental impact humans have on Earth, and why we must help lessen the negative effects. Watch below: