 Now we're going to move on and look at how to get the answers to problems four through seven, the next section of this assessment. So here I've got to make some new changes. I'm going to cut down the conservation of energy, turn that to one, and the growth rate stays at point one. The blue sliders are going to change so that the renewable upper limit is 20 all the way down here and the growth rate is point one. I'm going to turn the DCR, direct carbon removal switch on, set the start time to 2030. The target atmospheric concentration, I'm going to set this to 470. The cost decline rate, I'm going to make point zero two. So 2% per year decline in the cost of this process. The growth rate in terms of our capacity is going to be 2% per year and the initial amount that we can withdraw from the atmosphere is 5 gigatons of carbon. So that's all set. According to the instructions, now I'm going to run it and see what the ending temperature is in this case. And here, by the end, we see we're down to just below 2.1.97. So that's answer C. Then five is what is lowest pH in this case. So I'm going to flip to page number two. Looks like the lowest pH is back in here. That's about 8.06. So that's answer A. Then the next one is what is the total cost per person? So that's page 14 of the graph pad. I'm going to get there this way. There's 14. We see that's up considerably higher now. It's $9.00 per person at the end of time. So that's answer B. Now the last question, seven is, why do the human fossil fuel emissions drop to zero around the year 2095? So if we went back to, let's say, graph pad number two, you can see the human fossil fuel burning emissions. This is gigatons of carbons rising, flattening off, and then it just crashes. Boom, to zero here. And so why is that? Well, it turns out that if we cycle through here to page 11 on the graph pad, we see the fossil fuels. So this is in gigatons of carbon. And by the time we get to about 2095 or so, we've essentially gone to zero. So we've run out of fossil fuels. And so that's why the emissions dropped to zero, because we've got nothing left to burn. So that's answer C on the assessment.