To be fair, if we did mostly stop fossil fuel exploration and emissions right now we would get a quick reduction of antropogenic warming into some 80% to 90% of the current amount in some 4 decades due to some fast-degrading gases that are not CO2.
That said, we won't stop fossil fuel exploration and the related emissions, so yes, it's temporary.
It will not complete in your lifetime. While rich countries may be able to force conversion, we haven’t started thinking about the poorer ones. Even in the rich countries there are holdouts, like myself, who needs something with a transportable spare fuel source as EV range needs to triple for it to be useful for me.
Yes it would stop warning but it would be akin to genocide. The inertia around fossil fuels use in the modern world would cause the death of millions or maybe billions if stopped suddenly.
That said, we won't stop fossil fuel exploration and the related emissions, so yes, it's temporary.