Global warming best ppt. by Nikhil Bhardwaj

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Slide 1 : It's Gettin' Hot in Here! Presented by : Nikhil Bhardwaj
Slide 2 : Global Warming – What is it? Rise in earth’s temperature Results from changes in the natural environment Caused by too much carbon dioxide
Slide 3 : The Greenhouse Effect Solar radiation from the Sun reaches the Earth’s atmosphere The surface of the Earth absorbs most of the short-rayed insolation and later releases this heat in the form of infrared radiation into the atmosphere. Some of the heat is absorbed by particles known as “greenhouse gases.” The heat retained by the gases acts as a “heat blanket.”
Slide 4 : The Greenhouse Effect Without With
Slide 5 : Burning of fossil fuels The burning of fossil fuels releases Carbon dioxide in the atmosphere. In the past 150 years, burning fossil fuels has caused a 25 % increase in Carbon dioxide emissions.
Slide 6 : Carbon dioxide
Slide 7 : Burning of fossil fuels In the last 200 years: Nitrous oxide has increased 17%. Methane has increased 150%!!
Slide 8 : CO2 | NH4 | N20
Slide 9 : The Ties Between Sardines & Global Warming The over-hunting of sardines has caused higher levels of phytoplankton in the ocean. While living, phytoplankton release oxygen into the atmosphere and use Carbon for photosynthesis When they die, their decay releases large amounts of methane and the poisonous gas, hydrogen sulfide. It also uses large amounts of oxygen.
Slide 10 : Sardines & Global Warming (Cont.) Methane is 21 times more effective than carbon dioxide in maintaining heat in the atmosphere. This results in the deaths of numerous marine animals.
Slide 11 : Effects of global warming More carbon dioxide -> increase in plant growth. The increase in temperature -> rise in sea level from melting glaciers and polar ice caps (adds 0.2 mm annually) Rising temperatures will also cause drier conditions in many important agricultural regions.
Slide 12 : GLOBAL WARMING:Sea Life GLOBAL WARMING’S NEGATIVE IMPACT ON SEA LIFE— Coral Reef Bleaching— Change in temperature and elevated sea level cause loss of algae in the coral. Coral appears white, or “bleached.” Result is mass death of sea animals, which are dependent on the coral reef. The penguin population near Antarctica has been declining as the distance between them and their food has increased.
Slide 13 : Rising Sea levels The rise of temperature, even to a few degrees, could lead to the melting of ice shelves that hold back glaciers. This results in rising sea levels The Larsen area of North Antarctic, South of Chili and Argentina have lost more than 5,200 sq miles of area.
Slide 14 : The Effects of Global Warming on Land animals Global warming can disrupt the migration, hibernation and reproductive cycles of certain types of animals. Plants and animals will find it hard to escape or adjust to the effects of warming because humans occupy so much land. Farmland or cities interrupt the movement of species between habitats.
Slide 15 : Health & Global Warming Extreme temperatures can directly cause the loss of life (ex: 35,000 people died during heat wave in Europe, Aug‘03.) Warmer weather provides an ideal breeding environment for mosquitoes. Diseases such as West Nile will be more common.
Slide 16 : Health & Global Warming (cont.) High temperature can increase pollution of water and air, which harms the human body.
Slide 17 : Tropical Diseases Global Warming increases drought which lessens the supply of clean drinking water. Cholera It increases temperature providing an ideal breeding environment for mosquitoes. Dengue fever Malaria Yellow fever
Slide 18 : IMPACT ON AIR The atmosphere’s ultimate fate is unclear. More evaporation ? increase in cloud cover How High Will the Clouds Be? It makes a difference! Clouds close to the earth reflect sunlight ? cooling effect. Clouds high in the atmosphere trap heat ? warmingeffect. Generally: Cloud cover increases Levels of the greenhouse gas methane may increase Hurricanes range farther north, south on warmer water
Slide 19 : The Climate Stewardship Act First introduced in the senate in 2003 and reintroduced in February 2005 It would reduce carbon dioxide, methane, nitrous oxide, hydroflurocarbon and perfuorocarbons which are released by power plants to 2000 levels by 2010. The bill reduces the risk of global warming without hurting the economy.
Slide 20 : How To Prevent Global Warming: Plant trees Conserve energy: (examples: 1. use low-energy, low-water-use washing machines, 2. use a solar heated system for hot water, 3. use an electric or push mower for gasoline powered mower) Buy energy efficient products Buy products that have reusable or recyclable packaging Reduce use of car (walk instead)
Slide 21 : Reduce, Reuse, Recycle! 3R’s of Saving Mother Nature

 
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Add as Friend kerrin     1 Years ago.
4272 Views, 2 favourite
This is created by Nikhil.Wanna meet ,my facebook and yahoo is Bhardwaj7777@yahoo.com . i m smart a    more
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