To effectively remove gasoline odor, follow these steps:

1. Ventilation: Open windows and doors to allow fresh air to circulate and dissipate the smell.

2. Absorbent Materials: Use materials like activated charcoal, baking soda, or white vinegar to absorb the odor. Place these in the affected area and let them sit for several hours or overnight.

3. Cleaning Surfaces: Clean surfaces with a mixture of soap and water, then rinse thoroughly. For tougher stains, use a degreaser.

4. Neutralize Odors: Use a commercial odor neutralizer or create a homemade solution with vinegar and water to neutralize the gasoline smell.

5. Professional Help: If the odor persists, consider hiring a professional cleaning service.

The reason these methods work is that gasoline is a volatile organic compound (VOC) that can leave a strong, persistent odor. Ventilation helps disperse the gas molecules. Absorbent materials like activated charcoal have a high surface area that can trap the gasoline molecules, reducing their concentration in the air. Cleaning surfaces physically removes the gasoline and its byproducts. Neutralizers alter the chemical composition of the gasoline, making it less noticeable. According to the U.S. Environmental Protection Agency (EPA), gasoline is a known carcinogen and can cause respiratory irritation, so it's crucial to remove the odor promptly and effectively.