Globalwarming: Long term rise in temperature of the Earth's surface is called global warming. Causes: Increase in the atmospheric levels of gases (C O 2, C H 4, N O 2, e t c.) due to extensive burning of fossil fuels. Accumulation of these gases in higher concentration does not allow the Earth's heat to escape in the outer atmosphere, thus leading to increase in its surface temperature.
Climatechange will likely cause the ideal climate for these crops to shift northward. Combined with decreasing rural populations, as in the Great Plains, a changing climate may fundamentally change many of these communities. A warming climate and changes in precipitation patterns will likely decrease the number of days when recreational
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