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… land already covers one-quarter of the Earth’s terrestrial surface and a further 10-20 percent of land currently under … asses- sments of the crops’ quality in terms of yield, water use and resistance to atmospheric condi- tions, disease … resources including, inter alia, healthy soils and clean water. Micro-organisms can improve soil nutrients for plant …

… 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 – …