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Global Warning

Science Assignment by MeeYuan

Meeyuan D

on 25 November 2012

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Transcript of Global Warning

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli by MeeYuan Diep Global Warning What are Greenhouse Gases? •Chemical compounds found in Earth’s atmosphere
•Sunlight strikes the Earth’ surface, can be reflected back into space (infrared radiation- heat) but some are trapped by Greenhouse Gases causing the Earth to warm!
•Greenhouse gases- water vapour, carbon dioxide, methane, nitrous oxide, some are human made (burning of fossil fuels- carbon dioxide, etc.) How are Greenhouse Gases
produced? What are El Nino and La Nina? •El Nino is a climate pattern where the water in the Pacific Ocean near the Equator gets hotter which then affects weather and atmosphere around the world. The name ‘El Nino’ means ‘the little boy’ referring to the Christ child, this indicates that El Nino occurs in December near Christmas. This climate pattern changes the weather in the United States mainly in California and the southern states. El Nino usually brings more rain and cause higher temperatures. The warm ocean currents goes farther north and stays there for about 4 years.
• La Nina can be sort of like the opposite of El Nino. Its climate pattern is cooling the water around the equator which gets colder than usual. This also affects the temperatures around the world and the United States. It’s the period of strong trade winds over the eastern tropical Pacific. What is the effect on and of Rising Sea Levels? •Coastal erosion and landslide- increase storms which cause damage What is the Kyoto Protocol? Kyoto Protocol is an agreement signed many countries December 1997 in Kyoto, Japan. The protocol was developed by the UNFCCC - the United Nations Framework Convention on Climate Change. Countries who signed the Kyoto Protocol had agreed to cut emissions of carbon dioxide and other greenhouse gases by at least 5% below the 1990 levels between 2008-2012. What is the purpose of a Carbon Tax and who will employ one? As seen in the video, Carbon Tax would help to reduce the carbon emissions produced by major companies in order to slow global warming. Australia had been introduced to the carbon tax early this year. And many other countries will employ the carbon tax just like how our Prime Minister, Julia Gillard did so. •The most important greenhouse gases are carbon dioxide, methane, nitrous oxide and substances called CFCs. •One major cause of the increase in greenhouse gases is that we are burning up more and more fossil fuels, such as coal and oil for power. This produces carbon dioxide. • Carbon dioxide is also produced by 'deforestation' which means cutting down forests to use the land for something else. This is bad because living trees breathe in carbon dioxide from the air and breathe out oxygen for us! With fewer trees, more of these bad gases stay in the air. •Car exhausts and nitrogen fertilisers, producing nitrous oxide •And animal waste which releases methane. •And there’s more…. pollution, use of electricity, etc. •Coastal community flooding- ice caps and glaciers melt •Saltwater would go through low lying areas, reducing the availability of freshwater •Lost wetlands and estuaries How do the expectations on developed and third world countries differ? Bibliography •http://www.eia.gov/oiaf/1605/ggccebro/chapter1.html 17/10/12
•http://climate.nasa.gov/kids/bigQuestions/greenhouseEffect/, 17/10/12
•http://www.climatechangechallenge.org/Resource%20Centre/Climate-Change/2-what_are_greenhouse_gases.htm, 17/12/12
•http://news.bbc.co.uk/cbbcnews/hi/find_out/guides/world/global_warming/newsid_1575000/1575461.stm, 19/10/12
•http://www.weatherwizkids.com/weather-climate.htm, 19/10/12
•http://www.bbc.co.uk/climate/impact/sea_level.shtml, 19/10/12
Harcourt Education Ltd. (2007) Gary E. Barr: Behind the news: Climate Change, is the world in danger?. Great Britian: Heinemann. (pg.25, 40)
Youtube links:
.youtube.com/watch?v=fQd_DlkdQ1w&feature=g-hist MeeYuan Diep (: Thank-you for listening! There are higher expectations on developed countries because they more advance in technologies therefore they are expected to come up with more solutions.

The third world countries are poor compared to the developed countries such as Australia and USA, they are expected to try their best to focus on reducing their energy use.
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