Climate Change, page-18

Yes economics will drive this
https://www.abc.net.au/news/2020-01-28/why-finance-is-fleeing-fossil-fuels/11903928
and yes, public opinion will drive/push the money in that direction as well. It is the importance of being seen to be doing something that helps to sway the day and triggers this kind of response.
https://blogs.microsoft.com/blog/2020/01/16/microsoft-will-be-carbon-negative-by-2030/

Global Warming isn't only due to old style electricity generation, it is also about how we travel, we consume food, how we choose our clothing, how we conduct global trade etc. Our entire throw away culture.

Re the Paris accord.....it isn't ideal due to the knuckle heads of many Govts frightened of making hard decisions, but the Paris Accord is the best political vehicle available at the moment.