The global picture for freshwater use is fairly grim. Water supplies, as we discussed previously, are large but finite – and we currently tap pretty much all of the easy and cheap sources for freshwater. A relatively recent paper on the use of freshwater in agriculture around the world puts the blame, if blame is the word, on irrigated agriculture, which worldwide accounts for between 80 and 90 percent of freshwater use…..to read more, visit http://blog.alextiller.com