Industry is still using many hazardous organic solvents each year, because nonpolar SCF-CO2 can not dissolve many substances on its own. Once researchers develop co-solvents to cure this problem, SCF-CO2 will become the ideal environmentally and economically friendly solvent. But in general, while fluorine has been found to expand the use of supercritical carbon dioxide for extraction, it is also costly. Though fluorinated compounds may likely be too expensive to be used on a large scale, researchers are hoping that once developed, the surfactants can be mass produced much more inexpensively.