Earth's temperature and climate change

Science comes to the rescue: Earth’s stable climate*

Earth’s temperatures range from those of the frozen polar ice sheets of winter to the summer burning sands of tropical deserts; and life, in different forms, exists in all the climate zones. In studying climate change, scientists have taken global average temperature as a convenient indicator of the state of the climate.

Earth’s surface is sustained at an average temperature of about 15 degrees Celsius. It is assumed that this temperature is maintained b…

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