My colleagues around me always fart. What should I do with him?

Go to those shops that specialize in buying those strange things and buy one.

Come back with that "smelly fart egg"

When enabled according to the instructions.

Stuff it into a small jar. PS: Remember to cover it, or you will smoke yourself to death. ...

After all the gas in the ball is released.

After opening the lid, put it quietly in his place in a corner.

Slowly, the gas inside will float out. PS: It must be in a corner he doesn't know, and it is in his position.

Wait, everyone in the office knows that he always farts and then despises him.

Then take the jar away and throw it away while he is away.

Actually, those gases are sulfur dioxide.

Sulfur dioxide tastes like rotten eggs.