Priority environmental issues were beach erosion and a lack of a garbage collection system and designated area for garbage disposal.

UNESCO: Opinion survey

Nearly 840 people were evacuated from the central Berlin area, police said, before bomb disposal experts moved in to defuse the device.

CNN: Experts defuse unexploded WWII bomb in central Berlin

Petty Officer Diver Sid Laurence, from the disposal team, confirmed they were, adding they were "common around the city area".

BBC: German World War II bombs dug up in Plymouth garden

Gyro is delighted to have at its disposal the amazing resources of Forbes Insights in the ongoing investigation of this profoundly important area of inquiry.

FORBES: How to Engage the Most Engaged

The area was sealed off for more than 24 hours as searches were carried out by police and bomb disposal experts.

BBC: M5 alert