How many of these are needed to build one wind farm?

Question

Answer 1

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An average onshore wind turbine with a capacity of 2.5–3 MW can produce more than 6 million kWh in a year – enough to supply 1,500 average EU households with electricity. An average offshore wind turbine of 3.6 MW can power more than 3,312 average EU households.

Answer 2

How long is a piece of string?

Answer 3

I would think dozens.