[简答题] Water Problems Where’’s the water Water. If you’’ve got it, you probably take it for granted. But a quick look at the globe — and a chat with the tiny group of researchers who are worrying about fresh water — both indicate that water shortages are very serious. And they aren’’t necessarily in the future, either. Here’’s what we’’ve read in the past week or so. ... Mexico City (home to 20 million people) is sinking because the city sucks out underground water faster than the aquifer can be refilled. ... Florida wants to refill its overpumped aquifer (蓄水层) with untreated surface water, despite federal regulations to the contrary. ... Texas is moving toward private, for-profit water sales. The water will be "mined" from aquifers that are disappearing fast. No word on what the private suppliers, including corporate raider T. Boone Pickens, will do once the aquifers run dry. ... Aquifers around the world are being overtapped for i