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  1. 1. PROJECT THEME: “Greenhouse effect” Worked by: Dionisa Shabanllari, Gloria Avramushi, Amanda Labi. Class : XI C
  2. 2. Introduction
  4. 4.  Most greenhouses look like a clear mini glass house. They are used to grow plants in any environment. Greenhouses work because when the sun comes out the green house can trap the sunlight and use it to grow plants. The glass panels trap as much sunlight as possible but keeps heat in. This causes the greenhouse to heat up and help the plants grow.
  5. 5. Like a greenhouse the earths atmosphere traps heat and energy from the sun.
  6. 6. Earth’s atmosphere is slightly warmerthan what it should be due to directsolar heating because of a mild case ofgreenhouse effect…• The ground is heated by visible and (some) infrared light from the Sun.• The heated surface emits infrared light.• The majority of Earth’s atmosphere (N2 and O2) are not good greenhouse gas.• The small amount of greenhouse gases (H2O, CO2) traps (absorb and re-emit) the infrared radiation, increasing the temperature of the atmosphere…
  7. 7. incomingradiation Solar energy reaches the Earth’s surface
  8. 8. incomingradiation infrared radiation Earth’s surface warms, emits radiation
  9. 9. incomingradiation greenhouse gases infrared radiation Greenhouse gases absorb IR leaving the surface
  10. 10. incomingradiation greenhouse gases infrared radiation Gases are energized, then emit radiation (IR)
  11. 11. incoming radiation greenhouse gases infrared radiationSome of this IR reaches the planet surface, warming it further
  12. 12. b
  13. 13.  An increase in atmospheric temperature (human or natural origin) will lead to the increase in the water vapor content of the troposphere. Because water vapor is a strong greenhouse gas, the increase in H2O vapor in turn causes enhanced greenhouse effect, raising the temperature more. Higher atmospheric temperature will cause more evaporation of water Which leads to even higher temperature… Runaway Green House Effect!
  14. 14.  The primary components of Earth’s atmosphere, N2 and O2 do not have absorption in the IR wavelength range, therefore, do not have a significant role in setting the surface temperature of the planet… Greenhouse gas are efficient in absorbing IR light… The most important greenhouse gases are:  H2O – Water vapor.  CO2 – Carbon Dioxide  CH4 – methane  The most abundant greenhouse gas in Earth’s atmosphere is water vapor. Most of the greenhouse heating of Earth’s atmosphere is due to Water vapor absorption of IR radiation emitted by Earth, and then transferring the energy to the surrounding air molecule
  15. 15. The following pie chart displays the percent of eachgaswhich plays a role in the greenhouse effect.
  16. 16.  Burning natural gasses Deforestation Population growth
  17. 17. Without the greenhouse effect, the Earthwould not be able to support life. But if thegreenhouse effect becomes too strong, theearth will be too hot to support life. Even alittle to much heat could hurt the animals,plants, and everything else on the planet.Without the gasses that surround the planet,heat would escape back into space,causing the earths average tempter to beabout 60 degrees colder.
  18. 18. If we were to move the Earth closer to the Sun, like whereVenus is now, then we would suffer the runaway greenhouseeffect as well, lose all the water, and become hot like Venus.
  19. 19. Other planets also have Greenhouse Effects,Sun but these are unsuitable for life Venus Atmosphere: mass 90x earth’s GH Gases: >90% CO2 Sfc. Temp.: 477 C GH Effect: 523 C FAR TOO HOT! Earth GH Gases: ~0.04% CO2 ~ 1% H2O Sfc. Temp.: 15 C GH Effect: 33 C NOT BAD! Atmosphere: mass <1% earth’s Mars GH Gases: >80% CO2 Sfc. Temp.: -47 C GH Effect: 10 C FAR TOO COLD!
  20. 20.  Greenhouse gases absorb infrared radiation and prevent it from escaping to space. Carbon dioxide, methane, and nitrous oxide are very good At capturing energy at wavelengths that other compounds
  21. 21. PHOTOS :
  22. 22. SOLUTIONS : Reduce the use of materials which produce greenhouse gases. Avoid the burning of fossil fuel and household residue. Upgrade infrastructures. Afforestation. Using alternative sources of energy. Using eco-friendly materials. Incineration plant should be established. Pollution should be controlled……
  23. 23. CONCLUSION: Human, Oh, human Please do something. A little effort, a little care Put on a little effort and there will not be heat everywhere. There are not many forests, There are not many trees, Green house effect, Oh stop it please!!!! Stop littering, stop polluting Stop throwing rubbish into the sea; The oceans are dying, The earth is crying!!!! Save the planet, Save it please
  24. 24. WORK CITATIONS : “What Is the Greenhouse Effect?" Weather Questions and Answers. Web. 8 Jan. 2011. <http://www.weatherquestions.com/What_is_the_greenhouse_effect .htm>. DSilva, Roy. "Causes of the Greenhouse Effect." Buzzle Web Portal: Intelligent Life on the Web. Web. 7 Jan. 2011. <http://www.buzzle.com/articles/causes-greenhouse-effect.html>. "The Greenhouse Effects Impact." How to Prevent Global Warming: An Easy Way to Reduce Your Impact. Web. 8 Jan. 2011. <http://www.acoolerclimate.com/the-greenhouse-effects-impact/>. "The Greenhouse Effect." Test Page for Apache Installation. Web. 8 Jan. 2011. <http://hyperphysics.phy- astr.gsu.edu/hbase/thermo/grnhse.html>. Sharon. "10 Ways to Reduce Greenhouse Gases." Web log post. Town of East Gwillimbury. Web. <http://www.eastgwillimbury.ca/Environment/10_Ways_to_Reduce_ Greenhouse_Gases.htm>. Web. <http://wiki.answers.com/Q/How_are_we_to_prevent_the_greenhous e_effect>.
  25. 25. While doing this, we realized that we ,humans are the main causeof accumulation of greenhouse gases. Yet instead of realizing ourmistakes we’re busy putting the blame on others. We have made apromise that we will do whatever we can and also motivate othersto work on this field. What about you…………………? So once again Thank you…