What large desert is found in northern china and mongolia

Gold is not now being extracted from seawater. why not? a. it would be too disruptive to marine life to develop any marine mineral resources b. there is no gold in seawater c. we don't know how to extract minerals from seawater d. it would be too costly and difficult to separate the small amount of gold from the very large amounts of halite and other minerals

What is meant by the term relative location?

Which two following best identify the central themes of this speech in the passage the man in the arena