The computer power needed to create a single digital coinconsumes at least as much electricity as the average American household burns through in two years.
According to EPA figures, the average U.S. power plant emits 1.2 pounds of carbon dioxide equivalent(called CO2e) per kWh produced(other countries have higher or lower averages depending on their energy policy).
Since 1965 labour-saving devices such as washing machines andready meals have freed eight hours a week for the average American couple, but slightly more than all of that time has been swallowed up by childcare.
Your average U.S. consumer paid about $25 per month on video purchases and rentals, with 63 percent on DVD purchases, 7 percent on Blu-ray Disc purchases, 18 percent on rentals, 9 percent on video on demand, and only 3 percent on digital downloads.
米国の平均的なユーザーは、Facebookで1カ月あたり7時間45分を費やす。
An average US citizen spends 7 hours and 45 minutes on Facebook per month.
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