Question

I want a skit/play on pollution of 3 minutes.

Answer 1

here is a simple way:
first show a scene where friends are talking about pollution.
once they talk about the definition and the cause go to the next scene.
show them discussing how their family is facing problems due to pollution.
later show them asking their teacher on prevention.

or else you can show a journalist in the skit reporting about pollution causing problems in a village etc. covering the same points.