tourism is an income that countries obtain that it benefits a lot from but sometimes it can backfire on the country as well. As you can see from the picture that travellers are littering the beaches. You want to have beautiful tourist attractions so people can come and visit so that the country gets money and the people coming get their leisure time. But from all this litter on the beaches animals are eating the garbage on the beaches which isn't a pretty site. The country also has to pay more money in order for people to collect the garbage.
It can slow down tourism because of the cleanliness it might go down as one of the dirtiest places. Currently we are in the age of technology and we can search up tourist attractions and people can share their experienced before we go there, and we can also rate tourist attractions, and with bad ratings means no one will go there which means tourists will likely find a new place or country to spend their vacation.