The National Geographic Magazine, Volume 212, Issues 4-6National Geographic Society., 2006 - Geography |
From inside the book
Results 1-3 of 27
Page 44
... energy balance of corn ethanol - the amount of fossil energy needed to make ethanol versus the energy it produces - suggest that ethanol is a loser's game , requiring more carbon - emitting fossil fuel than it displaces . Others give it ...
... energy balance of corn ethanol - the amount of fossil energy needed to make ethanol versus the energy it produces - suggest that ethanol is a loser's game , requiring more carbon - emitting fossil fuel than it displaces . Others give it ...
Page 54
... energy factories . The potential , however , is huge . Exploiting the cellulose in corn plants , rather than just the kernels , could double corn's ethanol yield ; switch- grass could produce as much ethanol per acre as sugarcane . A ...
... energy factories . The potential , however , is huge . Exploiting the cellulose in corn plants , rather than just the kernels , could double corn's ethanol yield ; switch- grass could produce as much ethanol per acre as sugarcane . A ...
Page 57
... energy ( tractors , fertilizers , etc. ) and can grow on marginal land ENERGY BALANCE Fossil - fuel energy used to make the fuel ( input ) compared with the energy in the fuel ( output ) Cellulosic ethanol Between 2 and 36 , depending ...
... energy ( tractors , fertilizers , etc. ) and can grow on marginal land ENERGY BALANCE Fossil - fuel energy used to make the fuel ( input ) compared with the energy in the fuel ( output ) Cellulosic ethanol Between 2 and 36 , depending ...
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