David Attenborough has described the human impact on the deep ocean floor as “unspeakably awful” in a conversation with Prince William to mark the launch of the veteran broadcaster’s latest documentary.

Prince William and Sir David Attenborough explore the urgent peril of the world’s oceans, ahead of World Oceans Day and William’s speech at a global conservation summit

The new film “Ocean With David Attenborough” is both a breathtaking celebration of marine life and a sobering exposé of the industrial forces pushing the ocean toward collapse.