ENGRI_1110_Lect13_08 - Issue Fossil fuels produce CO2 CO2...

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Issue Issue Fossil fuels produce CO 2 CO 2 does not let heat escape and produces the “green house” effect Climate changes
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Are we Doing Enough? Are we Doing Enough? D.M. Kammen, Scientific American, Sept. 2006
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Photovoltaics Photovoltaics Solar cells/photovoltaics Phos – light Alessandro Volta – a pioneer in the study of electricity (1745 – 1827) www.climatechange.gc.ca
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Solar Cells/ Solar Cells/ Photovoltaics Photovoltaics Semiconductors devices convert sunlight into electricity Sunlight could potentially supply ~5,000 times world energy needs Cost 20-25 cents/kW-hr
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Photosynthesis Photosynthesis photoscience.la.asu.edu/photosyn Solar Energy to Chemical Energy Plants, bacteria
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Absorption Spectra Absorption Spectra photoscience.la.asu.edu/photosyn
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6CO 6CO 2 2 + 6H + 6H 2 2 O C O C 6 6 H H 12 12 O O 6 6 + 6O + 6O 2 2 http://www.sinauer.com/ Carbohydrates: high-calorie food ~ 1% conversion
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Photosynthesis Two massive protein complexes split water and carbon dioxide and forge new energy-storing bonds in sugar molecules.
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ENGRI_1110_Lect13_08 - Issue Fossil fuels produce CO2 CO2...

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