As a subtly portrayed in the cartoon,two tourists are taking sightseeing on a small boat while
discarding their picnic leftovers casually into the lake.Unfortunately,the lake is already littered
and teemed with flow rubbish like plastic containers,fishbones,banana peel,watermelon rind,bottles,
tins,food wrappings,and so on.And below the drawing,there is a topic which say "after" the travel or
"me" in the travel.From the portrayal,we can conclude that the painter wants to convey such a
message.A good many scenic spots are flooded with visitors,who flooded with visitors,who spoil the
beauty of nature by creating and leaving behind God-Knows-how-much trash.On the one hand,tourism,as
a multibillion-dollor business,is booming everywhere.Some people,laboring under the belief that
tourism serves as an engine of economic growth,seem to ignore its negative effects on the
environment.Nevertheless,these are not concerns that we can shrug off lightly.On the other hand,
tourism has exerted great pressure on the environment we are living in:water is polluted,the
ecological system is disturbed, and natural resources have been excessively used.Undoubtedly,tourism
could not be banned in any cuontry as it does help to shore up the economy in places which have few
sources of income.However,the significant point is that the unchecked growth of the travel business
may render the development of an economy unsustainable.It is high time that we enhanced people's
awareness to rectify this by taking the environmental protection into consideration.