Nuclear isn't truly green. It still involved mining, and industry that as of today does burn lots of hydrocarbons. Nuclear is certainly better, but it isn't 100% green. It could become green if we can manage to electrify mining and/or get uranium from alternative sources such as water. While I am a fan of nuclear power I don't think it is perfect nor totally carbon free. True renewables, when they are working, are still better than nuclear. Nuclear's niche is that 24/7 reliability that we need to gap-fill wind and solar.