I am studying a video about global warming, the professor starts with this expression: "So fossil fuel combustion is basically taking a jolt from that battery of the biosphere." Which, I am struggling with what it really means.
Here are the following sentences so that you could get the context.
"We're digging up some buried organic carbon and reacting with oxygen,to get the energy back. So one thing that may occur to you is does that mean we're going to use up the oxygen in the atmosphere? That would be like draining the battery of the biosphere all the way dead. Fortunately for us, most of the buried organic carbon in the earth is in an inconvenient form to use as a fuel."
My first guess was: The combustion of fossil fuel is sucking away the essence from the powerhouse of the biosphere, and it is getting weaker as time goes.
Could you confirm I am in the right direction of thinking this way?