How is the air adjusted on a typical gas burner?

The air on a typical gas burner is adjusted using an air shutter or vent located near the burner. By opening or closing this shutter, the amount of air mixed with the gas before combustion can be increased or decreased. Proper adjustment ensures efficient burning, achieving a clean blue flame, while improper settings can lead to incomplete combustion, producing yellow flames and increasing carbon monoxide emissions. Adjustments may vary based on the specific burner design and fuel type.