Download - Global warming CMC
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GLOBAL WARMINGAND CLIMATE CHANGE
CMCIES SALVADOR RUEDA MÁLAGA
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The Earth’s climate has changed many times during the planet’s history with events ranging from ice to long periods of warmth.
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From ice ages to warmth
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Firstly, let’s bring forward the fact that the sun radiation comes in and passes through the atmosphere.
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Energy emitted by the sun is also called shortwave radiation.
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On the one hand, most of this radiation is absorbed by the Earth and warms it.
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On the other hand, some energy is radiated back into space by the Earth in form of infrared waves
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So sun radiation comes in and earth radiation gets back into space.
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But some of this infrared radiation is trapped by the greenhouse gases and warms the Earth.
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Greenhouse gases
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A lot of people reckon that the Earth is by far so big that human activities can’t bring about a long-lasting damage on our environment.
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That idea might have been true in the past,but it isn’t true anymore, as the most vulnerable part of the planet is the atmosphere.
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As it is well known, it’s so vulnerable because of being very thin.
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If the Earth were an apple , its skin would be like its atmosphere (troposphere)
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Secondly, since eighteenth century, human activities have changed the composition of the atmosphere.
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Human activities versus environment.
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Therefore, human activities are very probably influencing the Earth’s climate.
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The term ‘climate change’ is often used interchangeably with the term ‘global warming’
but according to the National Academy of Science
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the first term is becoming more and more common because it helps to explain that there are actually others changes in addition to rising temperatures
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Human activities as fossil fuel burning and clearing of forest have added these gases to the atmosphere, mainly CO2.
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Greenhouse gases increasing
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In conclusión, the global temperature will probably rise from 1.1 to 6.4ºC during the
twenty-first century
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and it will depend on the future emissions, of course.
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However, warming is expected to continue for a long time (beyond 2100) even if emissions stop.
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Most people know we have a huge problem.…..
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In fact most of national governments have signed and ratified the Kioto Protocol
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for reducing greenhouse gases emissions.
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We fixed the ozone’s hole and we can try to solve and stop this problem, too.v
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But we have to change our behaviour soon, right now.
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