PERRY, Florida — Your mobile phone screen may have started out as a North Florida pine tree. A Florida mill that converts wood into cellulose for phone screens and other products is closing. Your next phone may have a plastic screen or some other inferior product. …Georgia Pacific is the current owner of the Taylor County mill that produces some of the best cellulose in the world. …When Georgia Pacific closes the cellulose plant, more than 500 workers will lose their jobs. But that is only the beginning of the tragedy. Hundreds of small businesses support the mill. Tree farmers, loggers, truckers, and equipment dealers are just some of the many family operations that will lose their biggest and perhaps only customer. …If Georgia Pacific doesn’t want to operate the plant, the State of Florida should be working to bring in a company that will.