**1)** **Open-Ended:** Using the principles set forth in the Reaction Pathway and Model sections of this module, develop a numerical model for the catalytic destruction of ozone using Polymath or another numerical methods solver. Also consider bringing in new ozone reactions, such as those dealing with bromine and NOx *(see References)*. Consider that your model still works at 30 km above the Earth's surface and at T = 300ºK.

**2) ** **Open-Ended:** See if you can think of scenarios where this model can be applied. Also, think of situations where this model fails. How can it be adjusted/reworked so that it is applicable to your problem? Creativity is important here.