Why is the market for wind energy in the United States so volatile?
a) Because the production tax credit used in the United States needs to be renewed every few years.
b) Because wind energy does not work well in the United States.
c) Because there is no area in the United States with good wind resources.
d) Because the feed-in tariff in the United States is too low.
e) Because of the recent financial crisis.
Suppose that you were to double the length of a wind turbine’s blade. How much more electricity would that wind turbine generate (keeping the wind speed and other factors the same)?
a) Four times as much
b) Twice as much
c) Six times as much
d) Eight times as much