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English Presentation (Global Warming)

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Jessica Ng

on 19 December 2012

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Transcript of English Presentation (Global Warming)

Causes Causes of Global Warming Greenhouse effect Global Warming Jessica
Deirdre Effects Solutions Rise in sea levels
More killer storms
Massive crop failures
Widespread extinction of species
Disappearance of coral reefs Rise in sea levels Melting of two massive ice sheets

Falling number of Adélie penguins
(from 32000 to 11000 in 30 years)

Some species are moving to cooler areas More killer storms Increasing intensity of most extreme storms worldwide

Increasing in wind speed Massive crop failures 3 billion people worldwide will have to choose between moving their families to milder climes and going hungry

Hundreds of millions of people are expected to become water stressed by the 2030 Widespread extinction of species Habitat-destruction, invasive species, and the build up of carbon dioxide in the landscape

Extinction of more than a million species Disappearance of coral reefs Ocean acidification

Coral populations will collapse by 2100 Is there any evidence? Long wave radiation
Some of it is trapped by greenhouse gases
Greenhouse gases:
carbon dioxide, methane, nitrous oxide, chlorofluorocarbons
and water vapor
Heat is trapped Causes of Global Warming Greenhouse effect Natural phenomenon keep the atmosphere warm
Increasing emission of greenhouse gases intensify greenhouse effect cause global warming (Kasting & James,1997) Is It Fact Or Fiction? Figure 1: Net human and natural percent contributions to the observed global surface warming over the past 50-65 years according to Tett et al. 2000 (T00, dark blue), Meehl et al. 2004 (M04, red), Stone et al. 2007 (S07, green), Lean and Rind 2008 (LR08, purple), Huber and Knutti 2011 (HK11, light blue), and Gillett et al. 2012 (G12, orange). This has been added to the SkS Climate Graphics Page. 1. Combustion of fossil fuels Burning coal, natural gas and oil in
power plants, cars, factories, etc. Causes of Global Warming Human Activities Natural event Intense volcanic eruptions

Ash and dust ejected reduce the amount of energy reaching the earth's surface 2. Deforestation Burning forests releases carbon dioxide and nitrogen oxide
Fewer trees are left to absorb carbon dioxide 3. Agriculture Methane is emitted from animal dung and cattle
Burning agricultural waste releases carbon dioxide and nitrous oxide
Use of chemical fertilizer releases nitrogen oxide 5. Production of man-made
greenhouse gases Facts of Global Warming What is global warming? Fig. 1.1

Instrumental record of global average temperatures taken from Brohan et al. (2006) (as a record of surface temperatures collected from land-and ocean-based stations). References: Catherine Brahic (2009). Billions could go hungry from global
warming by 2100 Retrieved from
Earth Policy Institute (2009). Melting Ice Could Lead to Massive
Waves of Climate Refugees Retrieved from
Elsner, J., Kossin, J. P. & Jagger, T. H. (2008). Nature 445, 92–95
John Roach (2004) Warming to Doom Million Species, Study Says.
National Geographic News
Kasting & James F. (1997). Warming early Earth and Mars.
Quirin Schiermeier (2008). Hurricanes are getting fiercer. Nature,
Webster, P. J., Holland, G. J., Curry, J. A. & Chang, H.-R. (2005).
Science 309, 1844–1846 4. Garbage treatment Methane escapes from landfills
Burning garbage in the incinerator emits carbon dioxide and nitrous oxide CFCs or HFCs are used to produce foams and solvents. John Vidal (2009) Nature (2008) Ken Caldeira (2009) National Geographic News (2010) Earth Policy Institute (2009) Government Technology Policy Individual Sustainable lifestyle
Beware of materialism and consumerism
Carbon offset
Support eco policies and campaign To supervise the Government
Hold eco-friendly campaign New Energy sources
Efficiency of generating electricity
Efficiency of usage of energy Cooperate with other countries
Reward & Punishment
Promote Eco-friendly Activities NGO Conclusion Who should bear the responsibility to solve the problem? Q & A Section Causes
Solutions Outline
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