David’s Reviews > Numbers Don't Lie: 71 Things You Need to Know About the World > Status Update

To get 2.5 terawatts of installed wind power by 2030, we would need an aggregate rotor mass of 23 million tons, incorporating the equivalent of about 90 million tons of crude oil. ... Undoubtedly, in less than a year a well-sited and well-built wind turbine will generate as much energy as it took to produce it.