Does 25% of all ocean waste come from cruise ships?
84 view
1 answer
Environment
What are the environmental problems caused by transportation?
44 view
1 answer
Which is the cleanest world in the world?
27 view
1 answer
What city in the world has the worst air pollution?
59 view
1 answer
What is the best green transport?
40 view
1 answer
What are the most common pollution items?
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1 answer
What animals live in Ha Long Bay?
52 view
1 answer
Why is the Annamite Range important?
33 view
1 answer
What is sustainable tourism and examples?
38 view
1 answer
Is it safe to swim in Halong Bay?
50 view
1 answer