Why do you insist on attempting to set renewables and nuclear in opposition?
Scotland for example recently hit generation of 97% of demand from renewables in the year 2020. As part of a larger grid with appropriate balancing and storage, 100% renewables is absolutely doable, and as part of a grid with some base load generated from nuclear (as the US and UK for example already have and is not going away soon), it's definitely doable right now with sufficient will and resources:
https://www.bbc.co.uk/news/uk-scotland-56530424
The only reason the US is trailing so far behind other countries is a lack of will to transition off fossil fuels, a chronic lack of investment in infrastructure and a balkanised electricity grid run for profit, all of which is fixable.
Emissions are increasing globally because we are building a lot of coal plants.
The fact remains that we are at least 2 or 3 decades from renewables being able to replace fossil fuels for power generation
That’s half a century of waiting