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From what I understand, this refers to the emissions of gasses by factories, cars, people, animals into our atmosphere which are said to contribute to the depletion of our ozone layer. This all boosts the carbon dioxide content which in turn also heats up our planet. In theory, once all this happens, polar...

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From what I understand, this refers to the emissions of gasses by factories, cars, people, animals into our atmosphere which are said to contribute to the depletion of our ozone layer. This all boosts the carbon dioxide content which in turn also heats up our planet. In theory, once all this happens, polar caps and glaciers begin to melt. The ocean's water temperatures begin to heat up. Plant life begins to suffer as well as all human and animal life. Therefore we have the "greenhouse effect". In order to prevent all this, we must work on alternative sources of energy.

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The term "greenhouse effect" is the layman's term for global warming caused by an excess of certain gases (most notably carbon dioxide) in the atmosphere.

When these gasses are present in excessive concentrations, they prevent heat from escaping from the earth's atmosphere and radiating back into space.  This is similar to the way that a greenhouse's roof traps the heat within the greenhouse.

In times when the concentration of these gases was lower, the heat escaped and the earth did not warm up.  Nowadays, it is believed, the gases are trapping the heat and causing the earth's atmosphere to warm up.

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