 So we're back at this figure from NOAA and from the IPCC and the figure is showing us how much carbon is in places in billions of tons, gigatons of carbon, and how much carbon is moving between places in gigatons of carbon per year, both for the natural situation, either how much was there or how much was moving, and for what humans have caused, how much is there and how much is moving. You might ask the question if we burn all the fossil fuel, or a lot of the fossil fuel, won't nature make more of it? And the answer is, well, yes, but not fast enough to matter. And so you'll note that what we're burning now in this figure, we are burning 6.4 gigatons of carbon per year. That number is now probably up around 9 or even a little bit. And nature does indeed bury carbon in sediments that can become fossil fuels. But you'll notice that the number down here is only 0.2. That's not very big compared to that 9 we're burning up above. And you'll also note that in the natural system, that burial is offset by what they have labeled as weathering over here, which is about the same amount coming out. Nature will make more fossil fuels. Nature will not make more fossil fuels fast enough that it counts in human economies. You have to think of hundreds of thousands and millions and more years to make enough fossil fuels to matter.