One day, the urban population noticed that factories were starting to pollute their city. The air was no longer audible with birds singing, but full of noise. A brave and frank girl decided to reveal the truth about the problem. She said it was urgent to prohibit harmful activities and decrease pollution. The mayor agreed and decided to abolish the old harmful rules.
Soon, the people began to ignite hope in their hearts and work together. In the end, they created an adequate plan to protect their city and make it clean again.
