evidence: The claim made is as follows: "Windmills are not sustainable over the entire life cycle". The claim was made by Wybren van Haga, Member of Parliament, engineer and entrepreneur. Van Haga has been active in the House of Representatives since 2017 and represents his own party: Groep Van Haga. [...] Milieu Centraal says that wind energy is clean and comes from a never ending resource. They do not mention that if there is no wind or too much wind, there is no production of power. The CO2 emissions are 50 times lower than those of ‘grey’ electricity. However, according to Milieu Centraal, ‘some’ CO2 is released during construction, maintenance and demolition. But after 3 to 6 months of operation, a turbine has already saved that amount of CO2 emissions. Over the lifetime of a wind turbine, 20 years, it produces up to 80 times as much energy as it takes to build one. It has not been stated which factors have been included in this calculation. It can be assumed that these are the same factors as mentioned before: construction, maintenance and demolition. The factors transport and recycling are not included. It is impossible for the reader to ascertain what this calculation is based on.