Without proper planning, tourism can cause problems. For example, too many tourists can crowd public
places that are also enjoyed by the inhabitants of a country. If tourists create too much traffic, the inhabitants
become annoyed and unhappy. They began to dislike tourists and to treat them impolitely. They forget how
much tourism can help the country's economy. It is important to think about the people of a destination
country and how tourism affects them. Tourism should help a country keep the customs and beauty that
attract tourists. Tourism should also advance the wealth and happiness of local inhabitants.
Too much tourism can be a problem. If tourism grows too quickly, people must leave other jobs to work
in the tourism industry. This means that other parts of the country's economy can suffer.
On the other hand, if there is not enough tourism, people can lose jobs. Business can also lose money. It
costs a great deal of money to build large hotels, airports, air terminals, first-class roads, and other support
facilities needed by tourist attractions. For example, a major international class tourism hotel can cost as much
as 50 thousand dollars per room to build. If this room is not used most of the time, the owner of the hotel will
lose money.
Building a hotel is just a beginning. There must be many support facilities as well, including roads to get to
the hotel, electricity, sewers to handle waste, and water. All of these support facilities cost money. If they are
not used because there are not enough tourists, jobs and money are lost.

很简单啊，整个短文就一句话概括， 旅游业的正面和负面影响，太多了造成城市拥挤，太少了没有钱