**7. Conclusion**

Plant materials go through several processes to acquire the necessary secondary metabolites and/or extract, including drying, extraction, separation, and purification. To produce better eco-friendly processes, the current investigation of the use of green solvents in the field of extraction needs more awareness for a greater perception of different factors such as innate solvent properties (polarity, viscosity, solubility, and pH), external factors (temperature, time, and solid-liquid ratio), and cytotoxicity. However, more study is needed on green or smart solvents that have high specificity for phytochemical compounds, as well as improved stability, recovery, and reduced operational costs. Until now, the framework has only been used to evaluate organic solvents. To expand the currently established techniques to new solvents, more study is required. This entails looking into novel waste-solvent treatment technologies as well as alternative solvent production techniques. Will the eventual transfer of DES/NADES-based extraction technologies to industrial sectors need further investments? Would their use result in a shorter lifespan for the extractors and the analytical tools required for their identification and quantification in the long run? All the questions are still open, and there are a lot of options for answers in the future.

*Green Extraction Techniques for Phytoconstituents from Natural Products DOI: http://dx.doi.org/10.5772/intechopen.105088*
