The Great Barrier Reef, the Grand Canyon, and the Inca city of Machu Picchu in Peru, are just some of the world’s most precious natural and cultural heritage sites, but they’re under threat from industrial activity. Alice and Neil discuss how sustainable tourism may help protect them.
This week’s question
Which sea creature is a potential threat to the Great Barrier Reef’s ecosystem? Is it a …
You’ll hear the answer at the end of the programme.