PrimarySchool Eng

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Information about PrimarySchool Eng

Published on January 10, 2008

Author: Bina


Climate Change in Hong Kong :  Climate Change in Hong Kong (Suitable for primary school) Slide2:  breathe out carbon dioxide breathe in oxygen Breathing Slide3:  Photosynthesis in plant breathe out oxygen breathe in carbon dioxide Slide4:  power plant Burning and electricity generation cooking with fire burning of coal , petroleum and natural gas to generate electricity carbon dioxide carbon dioxide Slide5:  The sun gives energy to the earth sunlight heating of the earth Slide6:  Heat dissipation by the earth heat dissipation by infra-red radiation sunlight Slide7:  carbon dioxide in the atmosphere Carbon dioxide lowers heat dissipation Slide8:  increase carbon dioxide in the air Relationship between carbon dioxide and the earth’s temperature decrease heat dissipation by the earth rise in global air temperature Slide9:  Use of electricity leads to the rise in global temperature use of electrical appliance require burning of coal, petroleum and natural gas, release carbon dioxide into the air rise in temperature Slide10:  Use of paper and wooden furniture lead to the rise in global temperature use paper and wooden furniture Trees are cut down to make paper and furniture less trees to absorb carbon dioxide rise in temperature Slide11:  Rise in sea level - expansion of water by heating - melting of ice on land Slide12:  water expands when heated, water level rises as a result heating Expansion of water by heating Rise in global sea temperature leads to expansion of sea water and a rise in sea level water water Slide13:  Melting of ice caps in polar land and glaciers in high mountains ( Source : US Geological Survey) 1928 2000 Slide14:  Rise in sea level by melting of glaciers ice block ice block water water ice blocks melt, water flows into the flask more ice blocks melt, the water level in the flask will rise Slide15:  Easier flooding of coastal areas during typhoon attack or heavy rain Sea level rise makes flooding of the coastal areas easier (Source: US National oceanic and Atmospheric Administration) waves caused by typhoon rose in sea level coast coast Slide16:  Getting hotter and hotter Slide17:  More and more heavy rain ( Source : Geotechnical Engineering Office ) leads to landslide dangerous to picnic and hiking activities Slide18:  More and more mosquitoes ( Source : HK Education City, and Food and Environmental Hygiene Department ) more mosquitoes, easier to transmit dengue fever Slide19:  Can air-conditioner stop global warming? No! turn on air-conditioner and lower the conditioner’s temperature drop in indoor temperature increase in electricity usage, require burning of more coal, petroleum or natural gas, release more carbon dioxide, result in global temperature rise Slide20:  What should I do? Save electricity (Source : Electrical and Mechanical Services Department) Slide21:  Take care of trees Plant more trees Prevent hill fire Save paper (Source: Agriculture, Fisheries and Conservation Department) Slide22:  Reduce expenditure Large amount of energy is used to produce commercial products and release carbon dioxide Slide23:  Save the earth, count me in!

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