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Geo Chap 2: Changing Global Enviorment, Part 2 - Coggle Diagram
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Part 2
Green Revolutions: Second stage evolved. New type of wheat and rice growing for tropical and subtropical climates.Irrigation, fertilizers and pesticides, farmers can grow two or three crops each year. India doubled its food production.
Problems with Greenhouse Revolutions: 400% increase in use of fossil fuels makes Green Revolution agriculture more vulnerable to oil price fluctuation.Social cost have higher costs. Environment damage.
Problems and projections: Locale and regional problems are responsible for food unavailability. Political problems are more responsible for food shortages than are natural events.Food distribution is highly politicized.Globalization is causing change in food preferences.
Deserts and Grasslands:Areas of arid and semiarid climate lie poleward (north and south) of the tropics. Comprise one-third of Earth’s land surface. Desert: areas that receive under 10 inches of rainfall a year. Prairie: North American grassland. Steppe: shorter, less dense grassland in Russia and Southwest Aisa.
Desertification: the spread of desert like conditionality by poor agricultural practices on marginal land.0% of the world’s rangelands are threatened by desertification; could harm 1.2 billion people.
Temperate Forests: Forests found in the middle of high latitudes. Dominate: Conifers or evergreens, Deciduous trees that loose leaves in winter. Regions, these forests have been cleared for agricultural purposes.
Food Resourses Globalization: Green revloutions have increased global food prductions. Using altred genetically seeds from mexico. In tesive planting through reduction in fallow periods or field-resting time between planting seasonal crop.