It is nearly twotimes. Because of one time of pasturage here, the field became poor and never be revitalized. According to World Watch Institute in the U. S., considering costs for revitalizing grasslands and fields, we get the result of some 10thousands dollars per one hamburger. The Desert Situation Also, large amount of river water is required for irrigation. Consequently, the delta and agricultural area experience the drying up ofwater.
Ground water is also in critical situation.
In 1997, it is also reported that 1 billion people, ten times as much as Japanese population, has been affected by drying. Now, agriculture is usually operated in the plain fields, which holds enough water. However, in Japan, people have reduced agricultural fields and constructed roads, factories, andshopping centers. The plain field is also suitable for operating industry and merchandizing. Biotechnology has been considered as the second Green Revolution.