The price of wind power has fallen from $2 per kilowatt hour in the 1970s to 5-8 cents now, compared with 2-4 cents for coal-fired power.
The price of wind power has fallen from $2 per kilowatt hour in the 1970s to 5-8 cents now, compared with 2-4 cents for coal-fired power.
风能电的价格也从1970年代的每瓦特2美元降至如今的5-8美分，而煤电也不过2-4美分。