Who is the person who is keeping our town clean and healthy, but nobody notices him?	It is the dustman.
After a hard working day....	...he is exhausted because nobody appreciated his effort.
As usually he spends his evening watching TV.	Suddenly.....
...he has a vision.	He starts to receive pictures on his TV.
He sees hard-working children...	who are taking care of our nature...
and cleaning our garbage.	Then, he realized he has to continue his battle for Earth's sake.
He has to go on an undercover mission.	Our beautiful nature must be saved regardless anything.
At the end he realized that this was an alien message....	from an alien tourist on a brief visit to Earth.