I know this is an unfathomable concept, but to actually "leave fossil fuels [...] in the ground" you have to stop using fossil fuels. Burning fossil fuels someone else refused to leave in the ground means--surprisingly--that fossil fuels weren't left in the ground after all.

And it turns out that we actually live on a shared planet with a common atmosphere; sourcing your fuels from abroad does nothing to prevent climate change. But it does mean that you are unable to secure some of the most fundamental inputs to your economy.