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Global Warmig
- 2. What is global warming? Global warming is the theory that we as humans are increasing greenhouse gases through industrialization causing more gases and the increasing the amount of sunlight that gets caught and heats the earth.
- 3. Causes of global warming Carbon dioxide emissions from fossil fuel burning power plants.
- 4. Carbon dioxide emissions from burning gasoline for transportation. our modern car culture and appetite for globally sourced goods is responsible for about 33% emission of CO2
- 5. Methane emissions from animals, agriculture such as rice paddies, and arctic seabeds. Deforestation ,especially tropical forests for wood, pulp and farmland
- 6. Increase in usage of chemical fertilizers on croplands. Greenhouse effect is responsible for global warming
- 7. Relation between greenhouse effect and global warming greenhouse gas pollution ,through its contribution to global climate change, presents a significant threat to health and environment upon which our economy and security depends
- 9. The world emits about 25.6 billion metric tons of greenhouse gases annually . Carbon dioxide stays in the atmosphere for approximately 100 years, methane lasts about 12 years. Other greenhouse gases last even longer. As these gases continue to raise surface temperatures, they trigger the release of even greater quantities of carbon dioxide and methane that are currently trapped in frozen Arctic permafrost and tundra soils, further increasing temperatures. …potentially causing “runaway global warming”. 25.6 billion metric tons CO2/yr These greenhouse gases last a long time… Warming begets more warming… A feedback mechanism ensues…
- 10. Worldwide Carbon EmissionsCarbon(109 metrictons) 0 1 2 3 4 5 6 7 8 1750 1800 1850 1900 1950 2000 Year Liquid fuel Total Gas fuel Solid fuel
- 11. Annual Carbon Emissions Annual carbon emissions Atmospheric CO2 Atmospheric CO2 average 1955 1965 1975 1985 1995 2005 0 4 6 8 2 Year Carbon(109 metrictons)
- 12. Effects of global warming Rise in sea levels worldwide More killer storms
- 13. massive crop failures Widespread extinction of species
- 14. Disappearance of coral reefs
- 15. So how can each of us slow global warming? Reduce ,reuse ,recycle Drive less or carpool Go solar By energy-efficient appliances Reduce waste Use less hot water Avoid products with lot of packaging Install a programmable thermostat Turn of electronic devices Plant a tree Look for renewable fuel option
- 16. Replace filters on air conditioner and furnace go green Conserve water Eat less hamburger Eat naturally Reuse towels Check your tires Wrap your water heater in insulation Become part of the global warming community Become aware of your contribution Spread the awareness Replace regular incandescent light bulb
- 17. Because greenhouse gas emissions are tied very closely to our energy consumption, using less fossil fuel based energy puts fewer greenhouse gases into the atmosphere. This will help slow global warming. Reduce our consumption of fossil fuels Mountaintop removal for coal mining 50% of electricity in the world is produced from coal. (
- 18. We can make some simple substitution Replacing just 1 incandescent light bulb with 1 compact florescent bulb saves about 150 pounds of carbon dioxide per year! If every American household replaced just 5 high-use incandescent bulbs with compact florescent lights we'd collectively save more than $8 billion each year in energy costs and we would prevent the greenhouse gases equivalent to the emissions from nearly 10 million cars.
- 19. Small changes really add up Replace your old refrigerator with a new Energy Star: Annual savings: $90; 700 pounds CO2 Set your thermostat down a few degrees in the winter Annual savings: $135; 1400 pounds CO2 Wash clothes in cold water only Annual savings: $70; 500 pounds CO2 Drive JUST 10 fewer miles per week Annual savings: $80; 520 pounds CO2 Reduce your garbage by 10% through greater recycling or reduced packaging Annual savings: 1200 pounds CO2 Caulk and weather-strip around doors and windows Annual savings: $80; 650 pounds CO2
- 20. Blowing up your world How many of you walked, bicycled or took public transportation to get to school today, instead of coming by private automobile? Our reliance on cars that burn fossil fuels is one of the major causes of increased levels of carbon dioxide in the atmosphere and it is the primary cause of urban smog.
- 21. Blowing up your world How many of you, when you drink a soft drink, throw the container into the garbage? Throwing away containers of any kind wastes energy and resources and adds to our waste problem. Many towns are running out of landfill space.
- 22. Blowing up your world How many of you, when you go to a store, get a bag for your purchases, even if you have only one or two small items to carry? Making paper and plastic bags uses energy and resources. The bags add to our litter and waste problems, and plastic is not biodegradable. Recycling is not the best answer because collecting and recycling materials requires energy. Instead, carry a reusable cloth bag or a knapsack with you.
- 23. Blowing up your world How many of you eat take-out or cafeteria food that is served in foam or plastic containers? Polystyrene and other plastic containers are made from precious petrochemicals, do not decompose in landfills, and release toxic gases when they are burned in incinerators.
- 24. Blowing up your world How many of you use handkerchiefs instead of tissues and use cloth towels instead of paper towels? Paper comes from trees. The more of it we use, the more trees that are cut down 2 pts d
- 25. Our take-home message… Each of us must take steps to protect our Earth's climate by stopping global warming
Hinweis der Redaktion
- In examining global warming, we will be looking at questions such as Is the world getting warmer? If so, are the actions of mankind to blame for earth’s temperature increases? What can or should be done about global warming? Are the potential resolutions to global warming worth the cost to implement them?
- This is a big picture examination of the earth’s climate The Earth was formed around 4.6 billion years ago And was originally very hot However, the Sun’s energy output was only 70% of what it is presently Liquid water was present on the surface around 4.3 billion years ago
- The first life forms appeared ~3.8 billion years ago Photosynthesis began 3.5-2.5 billion years ago, which produced oxygen and removed carbon dioxide and methane, which are greenhouse gases, from the atmosphere As a result, the Earth went through periods of cooling, commonly referred to as “Snowball Earth” and subsequent warming Earth began its current cycles of glacial and interglacial periods around 3 million years ago
- The temperature of the earth is directly related to the energy input from the Sun. Some of the Sun’s energy is reflected by clouds. Other is reflected by ice. The remainder is absorbed by the earth.
- If amount of solar energy absorbed by the earth is equal to the amount radiated back into space, the earth remains at a constant temperature.
- However, if the amount of solar energy is greater than the amount radiated, then the earth heats up.
- This spike is due to the exponential increase in the use of fossil fuels over the last 150 years. Shown here are emissions of carbon from gas, solid, liquid fuels, and the total carbon emissions.
- Despite this rapid increase in carbon emissions, only about half the carbon can be detected in the atmosphere. The remainder of the carbon dioxide is being dissolved in the oceans or incorporated into trees.
- Future Carbon Emissions will probably increase, especially in China and developing countries This will result in a likely doubling of carbon dioxide levels within 150 years, due to Increased coal usage And increased natural gas usage, although petroleum usage is likely to decrease due to increased cost and decreasing supply