Phong Nha Cave was the typical landscapes of the cave system in complex landscapes of Phong Nha-Ke Bang Since then the number of tourists to this skyrocketing increases in visitors to this national park area to cause problems for the environment here such as garbage, water pollution caused by tourism activities, the influence of humans on the caves, but especially for the threat to biological diversity.So let's Mobile protection, decent green-clean-beautiful. Worthy of a typical landscapes
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