Global Warming

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gases are generated a number of human activities such as fossil fuel
combustion, waste disposal in landfills, the use of a refrigerator,
numerous agricultural and industrial activities, and the cutting down of
numerous forests.

These human practices have already changed the chemical make up of the
atmosphere. Between the pre-industrial times and today, we have seen the
concentration of carbon dioxide rise 30% in some regions, in particular
the northern hemisphere, human practices have increased concentrations of
aerosols in atmosphere, which is a traditional form of air pollution),
which tends to cool the atmosphere.

With all these gases in the air, it is starting to change the EarthÆs
climate. The temperature of the EarthÆs surface is as warm, if not warmer
than it has been in any other century since at least 1400 AD. The
temperature over the past century has risen one degree Fahrenheit over the
last century. These last few decades have been the warmest this century.
The sea ...

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