How does a clean and healthy environment impact on tourist?

[Miley]

What's the importance of a clean and healthy environment and how does this impact on tourist earnings within a country?

[The First Dragon]

Tourists prefer a destination that is not full of diseases like cholera, malaria, and ordinary dysentery. In some countries you are told not to drink the tap water or eat any uncooked food.
Also, a clean environment is usually more beautiful and attractive.
When tourists come to a place, they spend quite a lot of money which benefits the local community without increasing the local population. So the place stays pretty and attractive.