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Global warming CMC

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About global warming and climate change.

About global warming and climate change.


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  • 1. GLOBAL WARMING AND CLIMATE CHANGE CMC IES SALVADOR RUEDA MÁLAGA
  • 2. The Earth’s climate has changed many times during the planet’s history with events ranging from ice to long periods of warmth.
  • 3. From ice ages to warmth
  • 4. Firstly, let’s bring forward the fact that the sun radiation comes in and passes through the atmosphere.
  • 5. Energy emitted by the sun is also called shortwave radiation.
  • 6. On the one hand, most of this radiation is absorbed by the Earth and warms it.
  • 7. On the other hand, some energy is radiated back into space by the Earth in form of infrared waves
  • 8. So sun radiation comes in and earth radiation gets back into space.
  • 9. But some of this infrared radiation is trapped by the greenhouse gases and warms the Earth.
  • 10. Greenhouse gases
  • 11. 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.
  • 12. 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.
  • 13. As it is well known, it’s so vulnerable because of being very thin.
  • 14. If the Earth were an apple , its skin would be like its atmosphere (troposphere)
  • 15. Secondly, since eighteenth century, human activities have changed the composition of the atmosphere.
  • 16. Human activities versus environment.
  • 17. Therefore, human activities are very probably influencing the Earth’s climate.
  • 18. The term ‘climate change’ is often used interchangeably with the term ‘global warming’ but according to the National Academy of Science
  • 19. 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
  • 20. Human activities as fossil fuel burning and clearing of forest have added these gases to the atmosphere, mainly CO2.
  • 21. Greenhouse gases increasing
  • 22. In conclusión, the global temperature will probably rise from 1.1 to 6.4ºC during the twenty- first century
  • 23. and it will depend on the future emissions, of course.
  • 24. However, warming is expected to continue for a long time (beyond 2100) even if emissions stop.
  • 25. Most people know we have a huge problem. …..
  • 26. In fact most of national governments have signed and ratified the Kioto Protocol
  • 27. for reducing greenhouse gases emissions.
  • 28. We fixed the ozone’s hole and we can try to solve and stop this problem, too.v
  • 29. But we have to change our behaviour soon, right now.