This invention relates generally to apparatus and methods for tightening tissue of the female genitalia by heating targeted connective tissue with radiant energy, while cooling the mucosal epithelial surface over the target tissue to protect it from the heat. An air handler has a temperature regulation element, a fan and a housing. 5 atm; and injecting the treated wastewater of step into a carbon dioxide stripping apparatus wherein the wastewater is free-fallen to expose the wastewater to ambient condition with carbon dioxide partial pressure of less than 0. A mobility level of the communication channel may be compared to a low mobility threshold corresponding to a low mobility level.