Arguably, citrus is the most powerful odor-eliminating ingredient. With 100% natural essential oils of tree-ripened fruit, citrus-based air fresheners help you eliminate odors, not mask them like other products. In addition, the eating effects last up to four times longer than water, gas, and synthetic-based odor-eliminating products. Along with eliminating unpleasant smells, citrus base odor eliminators leave a pleasant array of scents like oranges, limes, and lemons. In addition, citrus odor eliminators such as Citrus II Original Citrus Blend are great for hospital or nursing home use since they are non-toxic, non-aerosol, hypoallergenic, and biodegradable.