That us simply not true, I will dig out the study later when not on mobile, but wind has an energy (which is closely related to co2) ROI of 18 month or less, that is in about 19 month you have recouped the energy you put into building it. For nuclear this is around 40 years (I'm not sure if the numbers included decommissioning). Considering that both produce relatively little to no co2 during operation it's clear that relative wind wins by quite a margin. For solar the time was quite a bit longer IIRC (not 40 years however)