Blue trash can, garbage collection house;
Green trash can, where kitchen garbage is poured;
Yellow trash can, where other garbage lives;
Red trash can, harmful waste put it in.
Blue, green, yellow and red trash cans, don't make a mistake,
Men, women and children act together, sort garbage and use their brains.
Garbage sorting has many benefits, and the environment is good for three purposes.
I can do urban sanitation and create a civilized city.