How to utilize the waste water of Reverse osmosis (RO) plant?

Want to know how to use the waste water from RO water purifiers? Keep an eye on this Ask Experts thread for a complete information

Currently, most of the urban houses are equipped with the RO (Reverse osmosis)
plant for purifying the water. A major part of the raw water gets wasted when water gets purified by the RO plant. I want to know the ways through which this wastewater can be utilized. Can it be used to feed plant or trees? What is the best way to utilize the RO waste water?