formulated (see link for one of them) that project a 'rollover' of that usage before too long...perhaps by 2040, as the linked study predicts...btw, the link is very FF specific, with little analysis of alternative energy sources presented.
The overall strategy should be clear...develop a plan that reduces FFs dramatically, ASAP...you don't have a problem with that, do you?
Link: https://www.copenhageneconomics.com/dyn/resources/Publication/publicationPDF/6/386/1485851778/copenhagen-economics-2017-the-future-of-fossil-fuels.pdf