Smaller, cheaper, faster: Does Moore's law apply to solar cells?

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By Ramez Naam | Mar 16, 2011 09:00 AM | 19ShareEmailPrintThe sun strikes every square meter of our planet with more than 1,360 watts of power. Half of that energy is absorbed by the atmosphere or reflected back into space. 700 watts of power, on average, reaches Earth’s surface. Summed across the half of the Earth that the sun is shining on, that is 89 petawatts of power. By comparison, all of human civilization uses around 15 terrawatts of power, or one six-thousandth as much. In 14 and a half seconds, the sun provides as much energy to Earth as humanity uses in a day.The numbers are staggering and surprising. In 88 minutes, the sun provides 470 exajoules of energy, as much energy as humanity consumes in a year. In 112 hours – less than…
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Japan: The Disaster Images

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Meltdown fears amid quake chaos Fukushima nuclear power plant billows smokeMore detailsHome floats in the seaMore detailsExplosion hits reactor No. 4More detailsSoldiers suit up as radiation spreadsMore detailsHuge challenge for rescue workersMore detailsNuclear threat worsens in JapanMore detailsExplosion at nuclear plantMore detailsRescue workers swamped by rubbleMore detailsBuilding destroyed in Japan disasterMore detailsSkeleton of boat stranded on landMore detailsCars piled up after twin disastersMore detailsQuake clean-up continuesMore detailsTsunami pushes plane into buildingMore detailsBaby found alive in Japan rubbleMore detailsBody bags placed amid debrisMore detailsFactory burns in quake aftermathMore detailsBoat sits atop building in quake aftermathMore detailsSoldiers clean man possibly exposed to radiationMore detailsWoman shell-shocked in quake chaosMore detailsQuake-hit Iwaki residents line-up for foodMore detailsDebris strewn across devastated townMo re detailsTsunami survivor found out at seaMore detailsResidents scanned in nuclear threatMore detailsJapanese…
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