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we probably are! But......from my link above;
"It is not true to suggest that the world could not produce all its power needs through renewable methods.
Less than 1% of the worlds’s deserts, if covered with concentrating solar power plants, could produce as much electricity as the world now uses. Make that 1.5%, and it could power all the ground-based transportation energy as well (high speed trains, plug-in hybrid cars, trucks etc). See the Desertec website: http://www.trec-uk.org.uk/index.htm and http://www.trec-uk.org.uk/csp.htm
For the United States, the equates to only 15% of the Federal Land area of Nevada (and which could be dispresed) and approximately $2trln. of investment to supply and distribute 100% clean electricity to the entire United States. This is less money than the bank-bailouts and stimulus combined, and would have been a much better use of those resources. ALL the fossil-fuel power plants in the US could be shut down for good, and their CO2 emissions stopped (and all the nuclear plants shut down too). Power storage for nighttime demand would use heated salt storage, already a known technology fro the 1950′s. Other methods could compressed air storage and rock heating, but the heated salt storage would handle it all today.
The same applies around the world. 90% of thr world’s population lives within 2,700 km of a desert, and could similarly be supplied with solar electricty from there. HVDC power transmission has significantly lower losses/km than HVAC to make this viable, and the technology is available today. See the Desertec website: http://www.trec-uk.org.uk/elec_eng/grid.htm#incremental_hvdc
Edited by wildlife on 04/05/2012 20:18:03 MDT.
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