making a differenceone watt at a time

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slide 1 making a difference one watt at a time introduction is the world getting warmer? if so, are the actions of mankind to blame for earth’s temperature increases? what can/should be done about these issues? * 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?  history of earth’s climate earth formed ~4.6 billion years ago originally very hot sun’s energy output only 70% of present liquid water present ~4.3 billion years * 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 …

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 earth’s temperature sun solar energy radiation cooling *  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.  earth’s temperature sun solar energy radiation cooling *  however, if the amount of solar energy is greater than the amount radiated, then the earth heats up.  earth’s temperature sun solar energy radiation cooling *  if the amount of solar energy is less than the amount radiated, then the earth cools down.  greenhouse effect sun * to a certain degree, the earth acts like a greenhouse.  energy from the sun penetrates the glass of a greenhouse and warms the air and objects within the greenhouse. the same glass slows the heat from escaping, resulting in much higher temperatures within the greenhouse than outside it.  earth’s atmospheric gases non- greenhouse …

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hanism ensues… * worldwide carbon emissions carbon (109 metric tons) 0 1 2 3 4 5 6 7 8 1750 1800 1850 1900 1950 2000 year liquid fuel total gas fuel solid fuel * 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.  annual carbon emissions 1955 1965 1975 1985 1995 2005 0 4 6 8 2 year carbon (109 metric tons) annual carbon emissions atmospheric co2 atmospheric co2 average * 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 dioxide levels increasing co2 emissions, especially in china and …

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0 hours a day 54 x 10 540 wh/day 540x365 197,100 wh/day 197,100 1000 197.1 kwh/yr 197 kwh $115.34 $35.46 743.3 228.52 514.8 $79.88 we can make some simple substitutions 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. source: http://www.energystar.gov * 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 …

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wastes energy and resources and adds to our waste problem. many towns are running out of landfill space. 3 pts d blowing up your world how many of you eat fresh vegetables instead of canned or frozen? fresh vegetables cook more quickly and are usually more nutritious than frozen or canned foods. canned and frozen vegetables are often over-processed, contain additives, contribute to air pollution (transport and packaging) and add to our waste problem. 4 pts u blowing up your world blowing up your world how many of you use a hairdryer or other energy-consuming convenience appliance, especially in the morning? hairdryers use a lot of energy. in the morning so much energy demand is put on our grids that power companies have to find other sources of energy just to meet the morning rush hour 2 pts d blowing up your world . how many of you, when you …

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slide 1 making a difference one watt at a time introduction is the world getting warmer? if so, are the actions of mankind to blame for earth’s temperature increases? what can/should be done about these issues? * 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?  history of earth’s climate earth formed ~4.6 billion years ago originally very hot sun’s energy output only 70% of present liquid water present ~4.3 billion years …

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