Global Warming Power Point

Global Warming Power Point

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  Global Warming PowerPointBy:Michelle Ho
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  RadiationThe radiation istrapped inside the atmosphere when it is received in the highest layer in the atmosphereSome of the radiation is reflected off clouds and into spaceThe radiation that goes into the atmosphere is absorbed by oxygen and water vaporRadiation that comes back to Earth from clouds is absorbed by greenhouse gasesThe radiation that reaches the Earth is not all used in its surface because some of it is absorbed by seas and oceansIf the Earth gets more clouds, more radiation will be reflected back into space and less will reach the surface
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  Greenhouse GasesEach CO2molecule consist of one carbon atom with an oxygen atom bonded to each sideThe carbon dioxide molecule absorb radiation and the molecule starts to vibrateThe vibrating molecule would absorb radiation again and it would be absorbed by another greenhouse gas moleculeCarbon Dioxide is recycled through photosynthesisCarbon dioxide goes into the air when humans breathe out, burn fossil fuels for energy, and deforest the planet
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  Fossil FuelsFossil fuelscontain carbon and when they are burned, they combine with oxygen to form CO2Oil burning is responsible for 30% of all CO2 in the airNatural gas doesn’t release as much CO2 because of its methane structureCoal and oil are composed with more complex molecules which mean that they release ash particles into the environment that doesn’t burn which are carried to the atmosphere and cause pollutionNatural gases releases small levels of CO2 and no ash
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  Climate ChangeHigher temperaturesare caused by more greenhouse gases in the environmentSea levels rise due to melting glacier ice and expansion of warmer waterWarmer waters in the oceans caused the death of a quarter of the world’s coral reefsWith more moisture in the air, precipitation occurs which can lead to floodingHigher temperatures cause evaporations and more droughts because more water is soaked upThere are more frequent heat wavesThe Antarctic Peninsula warmed 5 times faster than the global averageThe warm moisture from waters caused more hurricanesThe weather causes changes in which plants and animals can live and loss of water supplies that come from glaciers
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  Proof of GlobalWarmingEach year, the temperature increase by 5 degrees CelsiusMore than a million square kilometers of sea ice were missing in the summer of 2007 compared to the previous yearJune’s land and sea surface temperatures were the second hottest record over the past decadeStudy shows that the troposphere was warming 0.2 degrees CelsiusThe stratosphere is cooling 5 times faster than the troposphere is warming which means that there’s an increase of greenhouse gases
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  The Kyoto AccordTheKyoto Accord wanted to decrease overall greenhouse gases among the nationsThe United States and Australia refused to confirm the treaty but still are expected to take some methodsTo stabilize CO2 levels, total greenhouse gas emissions must be cut by 60-80% within 50 yearsUnder the Kyoto, the European Union must reduce emissions by 8%The United States refused to confirm it but committed to a 7% reductionThe United States increased the gas emissions by 0.7 % in 2002
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  Debate About GlobalWarmingSome scientists say that some of the results of short-term weather conditions and not long-term climate trends and they say that human disruption of natural warming cycles possibly won’t affect sea levelsPolicy makers have a hard time deciding about what the countries should do to limit greenhouse gases in case global warming is caused from them
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  United States ProducingGreenhouse GasesUnited States uses a lot of deforestation which means that people are clearing new land for farming and pastures used for animalsTrees absorb carbon but we cut and burn them downWhen trees are burnt down, carbon is released into the air and carbon bonds with oxygen to form greenhouse gasesWe also drive a lot vehicles, which is different from Asia because they usually ride bikes to get somewhere and driving vehicles is burning fossil fuels