Sharon Huza from Greenville, North Carolina has developed a filter for gas. It's called the GasBGon flatulence filter. It being marketed to help provide "relief for thousands of gas passers who have cleared rooms or blamed the dog for far too long." The fabric is washable, and a removable foam filter muffles sounds while the activated carbon absorbs odors. Cushions can take about 450 "toots" before they need a filter change...