Windmills are not sustainable.
Neither are "green" power plants run by the Koch brothers, fueled by tar-covered railroad crossties. But they get huge government subsidies because it is advantageously classified under the Renewable Fuel Standard regardless of the fact that the plants spew out more carbon monoxide & harmful chemicals than any coal plants do.
Section 199, IRA, Biodiesel Blenders credits, etc. are all being taken advantage of, or possibly conspiratorially setup by government through corrupt energy lobbyists, or utilized in a way that opposes the true nature of how green energy is being sold. The "climate crisis" is a scam.
Coal and natural fuel are currently the most efficient means of creating energy until technology advances and/ or energy companies shift operational strategies. Studying at an Ivy League college, we were required to take an environmental systems course and we learned simple things like: the melting point of various painted metals is much higher than in their natural form, making recycling over twice the efficiency and wastefulness of consuming raw resources. Recycling trucks are usually driving around town burning fuel while being on average 10% full of "recyclable" material that will cost a lot of energy to re-use.
Regardless of Trump's hyperbolic, comedic comments, there is some truth to it, although it is dinner time and I don't have the spare time to explain windmills or solar panels to you.