The idea of this research flow up to reuse the treated wastewater establish green forests in the desert surrounded on the Egyptian cities and governorates, to face the climate changes and get benefits of wood and oils outputs which used to Improver to fuel of plane's engines, so it can be add new green areas using treated Wastewater, The study reached some of results that may be used to get some of the recommendations those are:
1- The treated wastewater in the Egyptian governorates amounted to about 1.66 milliard m3 from 121 sewage stations distributed in all governorates.
2- The desert surrounded areas in the Egyptian governorates reached to about 3.23 million acres, after deducting 20% services and roads they become about 2.59 million acres, the research aims to planting tree forests in about 277.2 thousand acres.
3- The cost of treated wastewater mentioned in (1) is about 23 LE million, in addition to the forests establish costs may reach about 2 LE milliard and operating cost of about 740 LE millions, if they done as the proposal.
4- The total areas allocated for planting woody forests are approximately 277.23 thousand acres
5- The woody output estimated at about 5.07 m3 million, estimated at about 4.4 LE milliard per year.
6- The total area allocated for planting Acacia, Jojoba and Jatropha trees those produce oil estimated at about 94.24 thousand acres.
7- The oil output Estimated by about 300 thousand tons, valued at about 16.3 milliard pounds.
8- Total revenue of forests in both its wood and oil amounted by about 20.7 LE milliard.
9- The investment costs of forests amounted to about 2.03 LE milliard for the seedlings, agriculture and land processing.
10- The annual operating cost of these forests is about 736 LE million per year.
11- According to ration water forest tree the annual total water needs amounted to about 1.99 m3 milliard annually, while the availability of wastewater amounted to about 1.64 m3 milliard, the difference is estimated at about 350 m3 million, can be get from treat more wastewater.