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Transport And Communications Xuanhao

Transport And Communications Xuanhao






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    Transport And Communications Xuanhao Transport And Communications Xuanhao Presentation Transcript

    • GLOBAL WARMING ; SEA LEVEL RISE You would want to be the world to be another Atlantis? SAY NO TO GLOBAL WARMING!
    • Imagine swimming with fishes? Imagine your world submerged under water.what would life be? Imagine eating seafood everyday. Imagine life without games/dota? Imagine sleeping under water , with dangers lurking everywhere. Imagine how would life changed? Imagine the people who don't know how to swim , living his life in the water. IMAGINE HOW LIFE WILL CHANGE IF THE GLOBAL WARMING’S EFFECTS GETS WORSE !
    • What causes global warming? Excess Greenhouse gases - carbon dioxide - methane Where does it come from? - It traps the heat and prevents it from escaping into outer space. Human use of fossil fuels is the main source of excess greenhouse gases. By driving cars, using electricity from coal-fired power plants, or heating our homes with oil or natural gas, we release carbon dioxide and other heat-trapping gases into the atmosphere. Deforestation is another significant source of greenhouse gases, because fewer trees means less carbon dioxide conversion to oxygen.
    • How actually is global warming used? - Many greenhouse gases occur naturally. - They are needed to keep the earth warm and to sustain life on earth. Without it, earth would be too cold to sustain life on earth and we would all be frozen. Thus, global warming was for a good cause. However, we did not thought of the long term effect of burning coal and natural resources to generate electricity. Therefore, global warming is now occurring.
    • What will happen if nothing is done? Ice caps and icebergs at the north and south poles would melt. Due to the increasing temperature of the earth. Due to the fact that heat is trapped in the earth due to greenhouse gases. Sea-Level Rises ! Lands would be covered by water. And if nothing is done.. We would be living under water. No doubt , our fate is sealed.
    • Problems faced Human continuing to use CFC products which cause the ozone layer to be destroyed Human continues burning and cutting forests and trees for argriculture and transport Human smoking and driving car which pollute the air(carbon emmision) Human uses machinery which gives off heat and harmful smokes Harmful rays of sunlight speed up ice sheets melting There would be lesser trees to photosynthesize and causes greenhouse effect Gases which traps heat causes the Earth to be warmer and ice sheets melt faster
    • Solutions Educate people so that they understand this global issue. Inventing machinerys which do not give out greenhouse gases Banned people from deforestation and issue law which approves people who deforest to be prosecutable Makes solar panel for cars so that they would not produce gases Discourage people from smoking and only permit lesser areas to sell cigarette Have the heart to protect Earth and care for the mankind.
    • VIDEOS http://video.nationalgeographic.com/video/player/environment/global-warming-environment/greenhouse-gases.html http://video.nationalgeographic.com/video/player/environment/global-warming-environment/glacier-melt.html Adapted from National Geographic
    • Credits National geographic Wikipedia Google Team – See Xuanhao Ngo Kahhang Lim Hongyu Chua Peng Hwee Tan Junwei