Kerry, I don't have the paper any more. Besides you would have to do the=20 research all over again. The numbers from 2001 no longer apply as the=20 energy demands and the generation sources in this country have changed=20 dramatically over the last thirteen years. The department of energy will have most of the numbers that you=20 would need and yes you can trust them. If you don't, you can research=20 all of the different companies that are generating all of the power in=20 this country. It is a lot of work and it would take a minimum of about 2=20 months worth of time at 60 hours per week. That is what it took back in=20 2001 to put my paper together for my college class on engineering. So go for it. I'm not going to do the work for you. Like I said I=20 don't have the paper any more. I don't have any of my school work from=20 back then. And the numbers just would not apply to today's country. But=20 don't just take my word for it. Go do the research for yourself. Be a=20 leader instead of a sheep. Thanks, rich! On 6/27/2014 10:44 AM, Kerry wrote: > Still no sources, though. > > Solar energy per square meter, realistically - 380WH / day EEVblog #632 > US energy use - 334,000.000 BTUs/person/year > http://en.wikipedia.org/wiki/Energy_in_the_United_States > US population - 318,000,000 http://en.wikipedia.org/wiki/United_States > 1 BTU =3D 0.293WH - http://en.wikipedia.org/wiki/British_thermal_unit > Total energy used - 3.11x10^16WH 334,000.000*318,000,000*0.293 > Area needed - 2.24x10^11 square meters 3.11x10^16/(380*365) > Area needed - 224000 square km > Area of US - 9,830,000 square km http://en.wikipedia.org/wiki/United_Stat= es > % of land needed -2.28% > > > > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .