““The fossil fuel industries were unionized in long struggles that were classic labor stories,” said University of Rhode Island labor historian Erik Loomis. “Now, they’re in decline and you have these new industries. But a green capitalist is still a capitalist, and they don’t want a union.”
About 4 percent of solar industry workers and 6 percent of wind workers are unionized, according to the2020 US Energy and Employment Report.The percentage of unionized workers in natural gas, nuclear, and coal power plants is about double that, around 10 to 12 percent unionized (although still not a huge amount). In addition, transportation, distribution, and storage jobs — which exist largely in the fossil fuel sector — about 17 percent of the jobs are unionized. Still, the solar and wind unionization rates are in line with the albeit very low national rate of unionized workers in the private sector, which is about 6.3 percent.
This is one of the big reasons there’s a real hesitancy on the part of many unions and workers to transition from fossil fuel to renewable jobs: They are worried the jobs waiting for them in wind and solar won’t pay as well or have union protections. This has long been a tension point between environmental groups and labor”
https://www.vox.com/22301534/major-unions-worried-about-wind-solar-jobs