It is reported that a hen could generate 7 KWH of electricity on average each year.
2
在美国,煤,天然气,核能以及水力发电的平均电价是一度电11美分。
U.S. residential customers pay an average of 11 cents per kilowatt-hour (kWh) for power from a mix of coal, natural gas, nuclear and hydroelectric sources, but renewables are far pricier.
3
据Brown的一项美国环保局授权的研究表明,美国数据中心2006年度消耗610亿度电。
One study by Brown, commissioned by the us environmental protection agency, suggested that us data centres used 61bn kilowatt hours of energy in 2006.