Tuesday, 11 November 2008

INTRODUCTION


The 21st century began with the change of World Potency with absence of the Soviet Union, the maintenance of United States and with the beginning of China how a potential superpower.

The aspects more important and representative of the 21st century are the debate about environment problem respect global warming fossil fuel pollution and alternative energy raged in the new century after most of the 20th century was marked by industrial expansion. Other aspect is the Cold War was over and Islamic fundamentalist-related terrorism.

For last, other important aspect that influences the development of humanity is digital technology for introduction in the lifestyle of cell phones and internet. In 2008, 3.3 billion people globally, or nearly half the world's population used cell phones, and in 2005, over a billion people worldwide used the Internet.

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