If we'd done what Nixon suggested climate change would probably not be a problem, as not only would we emit less than half current carbon emissions but the rest of the world would have followed and we'd have a huge nuclear power supply chain to make it easier for them to do that. We'd now be replacing gasoline and diesel with EVs and our carbon emissions would be falling rapidly.

While solar and wind have advanced quite a bit to the point that they're a viable option in many regions, whether or not nuclear is at least on the table is the litmus test for whether someone actually takes climate change seriously. Anyone who dogmatically rules out nuclear either doesn't actually believe in climate change or is hopelessly ignorant.

At the very least Germany and other countries should be leaving the perfectly good nuclear plants they already have online until the end of their operable life as they build out renewables and shut down coal and gas. The priority should always be shutting down fossil fuels first.