Which 10 world heritage sites are facing challenges or undergoing preservation efforts?

1. Great Barrier Reef, Australia – facing challenges due to climate change, coral bleaching, and ocean acidification
2. Venice, Italy – undergoing preservation efforts due to floods, subsidence, and overtourism
3. Machu Picchu, Peru – facing challenges due to overcrowding, erosion, and lack of infrastructure
4. Petra, Jordan – undergoing preservation efforts due to erosion, groundwater depletion, and illegal excavations
5. Angkor Wat, Cambodia – facing challenges due to deterioration, looting, and urbanization
6. Stonehenge, UK – undergoing preservation efforts due to erosion, vandalism, and inadequate management
7. Galapagos Islands, Ecuador – facing challenges due to invasive species, overfishing, and climate change
8. Taj Mahal, India – undergoing preservation efforts due to pollution, overcrowding, and structural damage
9. Yellowstone National Park, USA – facing challenges due to overuse, development, and climate change
10. Mount Kenya National Park, Kenya – undergoing preservation efforts due to poaching, deforestation, and climate change.