adcelannotate = {"mobilepaywallcategory" : "MOBILE_PREM-BUSINESS","nativepaywallcategory" : "NATIVE_PREM-BUSINESS"};Dear Car Talk: Why can't I use carbon dioxide gas to fill my tires instead of air (78 percent nitrogen) or instead of 100 percent nitrogen? If EVERYONE in the world filled their tires with carbon dioxide, wouldn't that take a LOT of carbon dioxide out of the atmosphere and slow global warming?