Tourism at its worst

Niemand hat dieses Rätsel bis jetzt gelöst.

The tourism industry has started to ... ... in the middle of the last century (2 words)
Trinkwasser, Süßwasser
They visit the places over and over again, so the ... is ...
a large ... ship can ... as many as 6000 passengers
jeweils, zu einer Zeit
leider
viel weniger Menschen
The difficult conditions mean that everybody needs to take a lot of ... with them
expeditions to ... ... the rubbish
(die Qualität) beibehalten
to ... the tourists an ecotax of two euros
ohne Erfolg
Reiseziel
people waiting in a line for something are ...
a (usually negative) effect (+ preposition)
Luftverschmutzung
a period of ten years
things that you throw away because they are no longer useful
a long journey, especially by boat or into space
the opportunity or right to choose between differnt things