 In this video, I'm going to show you an example of how you would use this interface to answer one of the problems on your lab activity. So the first thing to do is always click this restore everything button. So we go back to square one. Now in one of the questions you're asked to see what happens if you double the CO2 concentration in the atmosphere. See how that affects the climate. So what we'll do is to change the CO2 multiplier which we can do using this bar here. You've got to have a kind of a fine touch to get it right at two exactly. So instead I'm just going to type the number two in there and that's all you have to do. It's ready to go and we just push run and we can see what happens. Now we can find out by looking at this that the CO2 concentration at this point is 760 parts per million and that stays constant throughout this time. So that's twice what it is right now where the model is set at 380 ppm initially. And if you wanted to find out how much the planet warms because of that, you just trace your cursor along this blue curve, the temperature and see where that maxes out and there it is. You could enter that as your answer for this particular question and that's all there is to it.