A bill has been proposed in New Mexico to add the smell of roasting green chilies as a state symbol, making it the first US state to have an olfactory symbol. The bill, introduced by Democratic senator William Soules, aims to differentiate New Mexico's green chilies and could attract more tourists during the green chile season. The smell would be protected only during autumn. The bill has moved through two committees and is now awaiting a vote in the full state Senate.