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Energy: Perspective. Homework, see: Professor Nate Lewis, Global Energy Perspective http://nsl.caltech.edu/energy.html. Where is the energy coming from?. current power consumption is ~ 13 TW. see: http://nsl.caltech.edu/energy.html. Projections. Is this path sustainable?.

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Energy: Perspective

Homework, see:

Professor Nate Lewis, Global Energy Perspective

http://nsl.caltech.edu/energy.html


Where is the energy coming from?

current power consumption is ~ 13 TW

see: http://nsl.caltech.edu/energy.html



Is this path sustainable?

Remember that all of this fossil fuel combustion is releasing CO2. How high will CO2 concentrations go? That, of course, depends on what actions we take!!!!

WRE figure: for Wrigley, Richels, and Edmonds

Wrigley, T.M.L., Richels, R., & Edmonds, J. (1996) Economic and

environmental choices in the stabilization of atmospheric CO2

concentrations. Nature, 379, 240-243

Emissions pathways that lead to CO2 stabilization levels:

What is the energy mix pathway that leads to stabilization of atmospheric CO2 at 450 ppm? WRE 450 path

Higher WRE number means that we are using high intensity fossil fuel mix, and slowly transitioning to non-CO2 emitting energy pathways.


CO2 concentration

How much CO2 are we going to put in the atmosphere?? That is up to YOU!!

Journal of Climate2003, 16, 206-223

Mauna Loa Data

Temperature



Fossil Fuel Use and CO2 stabilization



Where is the energy going?

Spiro and Stigliani, Fig. 5.12. p 119 Flow of energy through the U.S. economy in the year 2000 (Values are units of exajoules (1015 J)).


Where is the energy going?: Electricity production

2/3 of energy consumed to produce electricity is lost!!!

Spiro and Stigliani, Fig. 5.13. p 120 Flow of energy from electricity through the U.S. economy in the year 2000 (Values are units of exajoules (1015 J)).


Us energy flow 1999 net primary resource consumption 102 exajoules
US Energy Flow -1999Net Primary Resource Consumption 102 Exajoules


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