| Nice quiz, but terawatts per hour is not a unit that makes sense here.
I can't be sure without seeing the source, but I suspect that it's actually terawatt-hours used in one year. Terawatts are a unit for energy per unit time. Terawatt-hours (i.e. terawatts times hours) are a unit of energy.
For reference, one terawatt-hour is the amount of energy that would be used in one hour by a group of 10,000,000,000 very bright light bulbs using 100 W each. |