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Word Count: 2,203
While some people believe the earths climatic changes are due to the fact that theuniverse is getting older others believe it is due to the greenhouse effectThe greenhouse effect is a naturally occuring phenomenon that is responsible for trapping heat near the earths surface and keeping the planet warm It is called the greenhouse effect because the way it works is similar to the way in which a green house functions In a greenhouse sunlight passes through the transparent roof and walls and strikes the objects inside- plants flowerpots tables and so forth These objects absorb energy from sun become warmer and then give off energy themselves in the form of heat Only a little of this heat energy passes out through the glass much of it is trapped in the greenhouse raising the temperature insideIn some ways the earth functions rather like a greenhouse except on a much larger scaleAlthough the greenhouse effect has only recently been in the news is nothing new in th history of our planet has played major role in making life on earth possible Without the greenhouse effect the earth would be too cold for living thing to survive The big question today is If greenhouse effect is natural why are people so worried about it Is soemthing good turning bad Up until about 150 years ago the compostion of the earths atmosphere had remianed relatively unchanged for several thousand years Since mid 1800s certain human activities have been changing the heat trappin ability of the atmospher dramatically as a result more heat is being trapped by the atmosphere Scientists have been anticipating this strengthening of the greenhouse effect for sometime and that it will lead to a worldwide increase in temperature This is come true because the world is getting warmer Global warming can be expected to change the earths climate dramatically and in a relatively short time As temperatures increase experts predict that weather patterns will be
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