 This last model has some new features added to it and so I want to explain these before you play with this model It includes two new reservoirs unproven reserves and unknown oil here And these can be tapped into through a process of discovery and eventually flow into the proven reserves here these two Discovery flows here controlled by switches, and I'll show you those switches in a second you can turn them on or off and They're also controlled by a timer here that controls when we really tap into These other potential sources of oil Other than that it's it's quite similar to the the other model Here's what it looks like when you interact with the model you open the the model you'll see this You can turn on these switches here. There's the unproven switch, and here's the unknown switch now We're set to tap into those two new sources of oil And then down here we control the time when we would start to produce that oil So let me turn these things off first the switches There's one switch turned off. There's another one off. I'm just going to go ahead and run this model It's running now from 1800 to the year 2600 and here it shows the production Peaking here at about the year 2000 then dropping off. Here's the population leveling off it at I've got a leveling off at 11.7 billion here in this case almost 12 billion now If I watch this if I turn on this unproven switch here and Run the model You can see the production curve changes see that it gets bumped out basically because of the addition of this This oil here produced by discovery so then if we if we put this one on here turn that on Then we can Even make a more gradual decline in this production curve So we're tapping into these new sources and it makes that decline from the peak here much more gradual now There are lots of things you can change here You can change how much is in the unproven reserves and how much is in the unknown oil Reservoir you can control the rate at which those new sources are tapped into You can control the timing of when we really Aggressively start this this expiration to tap into these new resources. So this is just a little bit more optimistic model