Next, how much land would it take to replace a 1000 MW coal or nuclear
power plant that operates 24 hours/day and might power a large city? This would
require 106 kW × 24 hr/(0.4 kWh/m2) or 6 × 107 m2. So, with 60 km2 (or 24 square
miles) of photovoltaics we could replace one of last century’s power plants with one of
this century’s power plants. This is a square 8 km (or 5 miles) on a side. For the same
electricity production, this is equivalent to the area for coal mining during the coal
powered plant’s life cycle, if it is surface mining, or three times the area for a nuclear
plant, counting the uranium mining area [3]. This is also the same area required to
build a 600 km (373 miles) long highway (using a 100 m wide strip of land).
Next, how much land would it take to replace a 1000 MW coal or nuclearpower plant that operates 24 hours/day and might power a large city? This wouldrequire 106 kW × 24 hr/(0.4 kWh/m2) or 6 × 107 m2. So, with 60 km2 (or 24 squaremiles) of photovoltaics we could replace one of last century’s power plants with one ofthis century’s power plants. This is a square 8 km (or 5 miles) on a side. For the sameelectricity production, this is equivalent to the area for coal mining during the coalpowered plant’s life cycle, if it is surface mining, or three times the area for a nuclearplant, counting the uranium mining area [3]. This is also the same area required tobuild a 600 km (373 miles) long highway (using a 100 m wide strip of land).
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