Steady increase in the Earth'sÂ averageÂ lowerÂ atmosphereÂ (near surface)Â temperatureÂ dueÂ toÂ emissionsÂ andÂ buildÂ up ofÂ greenhouse gasesÂ (seeÂ greenhouse effect). While this temperature has risen by 0.6Â°C in the last 140 years, it may rise from 1.5Â°C to over 2.0Â°C by the year 2070, and could completely alterÂ climateÂ zoneÂ patternsÂ resulting in increased or decreased rainfall, winds, snow, and other unprecedentedÂ weatherÂ phenomenon. The rising temperature could melt the polar iceÂ capsÂ and causeÂ sea levelsÂ to rise everywhere, permanently flooding manyÂ lowÂ lyingÂ partsÂ of the earth. The temperate areas in Asia and Americas mightÂ experienceÂ crop failuresÂ due to drier and hotterÂ conditions.Back to previous
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