Just took another look at this thread, and I'm sort of surprised there aren't more responses.
The thing that most sours my outlook on wind and solar sources is the natural gas backup that comes with them. Over the last decade or so, lots of countries around the world have been trying to transition away from nuclear power generation and towards wind and PV power. The operating data coming from the shift of source points to the idea that natural gas emissions are a lot cleaner than coal emissions, but the whole"carbon footprint" hasn't changed much.
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