The "exhaust" from wind turbines is concerned with the coal used to make steel, the diesel powered trucks and ships required to install them, and then haul them away in 20 years after they've become landfill.
Then of course, there is the surface resins that are adding to plastic waste at sea, the petroleum coke used to make electrodes for aluminum production, and, of course, not that we give a rat's ass about poor people, the nitric acid utilized to refine lanthanide ores in Baotou, etc, etc. The nitric acid is made using dangerous natural gas, generally, sometimes coal in China.
The low energy to mass ratio of wind turbines makes them a popular, but useless tool to "address" climate change, even though the popularity of their industrialization has coincided with a increase of the rate of the dangerous fossil waste carbon dioxide's accumulations in this century to 2.4 ppm from the rate observed at the close of the 20th century, 1.5 ppm per year (ten year averages in both cases.)
The wind industry is nothing more than a fig leaf for the dangerous fossil fuel industry and would die in a New York minute without access to coal, oil and dangerous natural gas.
It will never be as clean and as sustainable as the nuclear industry.