Sprinkle a tablespoon of salt into a halved orange with the flesh scooped out and set it where odors tend to linger.
Four Chemical-Free Ways to Freshen the Air at Home

Most air fresheners you buy in the supermarket don't actually destroy odors — they just mask them, often with a cocktail of chemicals that aren't especially healthy for you or the environment, including formaldehyde, phenol, and petroleum distillates like butane and propane. Here are a few healthier, more environmentally friendly alternatives you can make yourself. (Be cautious with these if you have young children or pets around the house.)
Use an Orange-and-Salt Deodorizer
Soak Up Odors With Baking Soda
Baking soda is great for absorbing acidic odors. It can also be used as a spray — dissolve a teaspoon in a cup of water and mist it as needed.
Neutralize Odors With Vinegar
Vinegar neutralizes alkaline odors. It can smell a little strong itself at first, but that initial odor fades quickly.
Simmer Citrus or Cinnamon on the Stove
Placing citrus fruit or cinnamon in a pot of water and simmering gently for a few minutes will completely invigorate a room.
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