What is it? What will it do? What can we do about it? Global Warming
What is it? What will it do? What can we do about it?
Global Warming
What is Global Warming?
• An increase in the Earth’s atmospheric and oceanic temperatures due mostly to pollution
What Causes Global Warming?
• Greenhouse Gases– Definition: Gases in the atmosphere that absorb and
emit radiation• some greenhouse gases are natural
– water vapor, carbon dioxide, methane, nitrous oxide, and ozone• other greenhouse gases are manmade
– carbon dioxide, nitrous oxide, and methane
– Manmade greenhouse gases result from burning waste, wood, and fossil fuels
– We need some greenhouse gases to keep the Earth warm
– Too many greenhouse gases, however, make the Earth HOT
• This is known as: THE GREENHOUSE EFFECT
The Greenhouse Effect
The ENHANCED Greenhouse Effect
• When too many greenhouse gases are present, less radiation from the sun is able to escape the Earth’s atmosphere
• This causes the Earth’s temperature to increase
The Earth’s Rising Temperature
• According to StopGlobalWarming.com:– Scientists commissioned by the United Nations have determined
that global temperatures should increase by 1.1°C – 6.4°C over the next few decades.
– The earth’s temperature has already increased 0.17°C every decade since 1978.
– Several SRES scenarios were developed that took into account: population growth, economic activity, international co-operation, and the use of fossil fuels / renewable resources
• A1 : The A1 scenarios are of a world more integrated • A2 : The A2 scenarios are of a world more divided • B1 : The B1 scenarios are of a world more integrated, and more
ecologically friendly• B2 : The B2 scenarios are of a world more divided, but more
ecologically friendly– All scenarios show a dangerous increase in temperature levels
The Earth’s Rising Temperature
What Happens When the Temperatures Rise?
• Polar ice caps melt
• Increased probability and intensity of droughts and heat waves
• Warmer water and more hurricanes
• Rise in sea levels
• Massive crop failures
• Extinction of plant and animal species
Polar Ice Caps from 2004-2007
Hurricane Katrina – The New Norm?
South Florida – Before and After Rising Sea Levels
How Can We Prevent These Atrocities?
• Recycling• Purchasing environmentally safe
automobiles• Using minimal electricity • Reducing CO2 emissions• Spreading the word on global warming• Cap and Trade Programs• Approving the Kyoto Protocol
Sources• http://www.sei.ie/images_upload/Schools/Secondary_Schools/Subje
cts/Geography_LC/Greenhouse_Effect_/greenhouseeffect.jpg• http://environment.about.com/od/faqglobalwarming/f/
greengases.htm• http://whitepaper.climatechange.gov.au/science/faq/images/
gheffect-enhanced.jpg • http://www.stopglobalwarming.com.au/images/future_forecasts/
global_warming_temperature_trends_projections.jpg • http://www.environmentalgraffiti.com/sciencetech/5-deadliest-
effects-of-global-warming/276 • http://www.huffingtonpost.com/archive/236/images/photos/3466/
original/original.jpg• http://www.freewebs.com/boomboy321/Hurricane.jpg• http://mydailyclarity.com/wp-content/uploads/2009/09/indian-
farmer.jpg• http://people.eku.edu/ritchisong/extinctions.gif