NASA has said that human activity is causing a acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter redistribution of freshwater across Earth. The acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter is continuing as populations shift and acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter for food increases. NASA said equatorial acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter are drying, while acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter areas and higher latitudes are getting acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter . If this trend continues, many highly populated acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter could struggle to find enough water in the acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter . NASA spent 14 years studying the shifting acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter of freshwater. It was part of a mission called GRACE, which is an acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter for Gravity Recovery and Climate Experiment. Jay Famiglietti, a co-author of the acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter and NASA's Senior Water Scientist, said: "The acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter shows that humans have really acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter altered the global water landscape in a very profound acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter . The human fingerprint is all over changing freshwater availability." He warned that: "We see it as a acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter of climate change." Professor Famiglietti said that at acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter 40 per cent of the 34 acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter areas looked at in the research were drier than acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter years ago because of human acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter . One big reason was the excessive acronym activity areas availability demand drastically driver future hot huge least pumping redistribution regions research study tropical twenty way wetter of groundwater for farming.