Is tourism harmful?

Vocabulary 1 : fountain 
definition:
a stream of water that is forced up into the air through a small hole, especially for decorative effect, or the structure in a lake or pool from which this flows
example:
There is a fountain in the lobby of this hotel.

Vocabulary 2 : restriction
definition:
an official limit on something
example:
There are speed restrictions on this road.


My opinion about ” Is tourism harmful? ”:
Everyone wants to go to famous scenic spots, so am I.
If tourists have a sense of virtue, they will respect the different cultures of world, and be harmless to the different countries. Also maintaining the environment by viewing the scenery
I consider they can make a convention with recording the tourists when entering the places to achieve the eviroment be tidy and clean.
If everyone respects each other, the world will become better.