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… valuable services, land feeds our families, provides fresh water and powers our future ambitions. Much of the data … the billions of tons of carbon stored underground. • The surface of the earth is approximately 70.9% water and 29.1% … herbicide, nitrate and soluble phosphate contamination of surface waters (by 70%, 85% and 65% respectively). 57 11 11 …

… cannot be sustained over the long run. As oil, clean water and arable land become scarcer, their cost as … cultivation in temperate latitudes, Figure 1.2: Changes in Surface Temperatures 1970-2004 Source: Climate Change 2007 – … cultivation in temperate latitudes, Figure 1.2: Changes in Surface Temperatures 1970-2004 Source: Climate Change 2007 – …