CANBERRA, Australia -- Global Green groups have begun a campaign to have the coral reefs of the Pacific island of New Caledonia nominated for World Heritage listing.

CNN: Green bid to preserve Pacific reef

This made it particularly important for Green groups to act in a united fashion to help get the reefs a World Heritage listing, particularly as the move was likely to face entrenched political and corporate opposition.

CNN: Green bid to preserve Pacific reef

The Unesco World Heritage Site listing for numerous earth buildings highlights a growing sense of urgency regarding their preservation.

BBC: The Hakka earth buildings of Fujian

Margate appears with Iceland, Puerto Rico and the World Heritage site of Dubrovnik in Croatia in the new Rough Guide listing.

BBC: Margate