Some general guidelines are available. This is an argumentative paper and the logic must be readily apparent. I have included here a few rough sketches or examples of some basic kinds of arguments that could be made. These are only examples, that may or may not be sound, and many other possibilities exist. Also, it may be necessary to construct complex arguments by arguing for one or more of the premises.
Chemistry is required to understand the ozone problem.
Chemistry is required to understand the acid rain problem. Chemistry is required to understand the air pollution problem. Ozone, acid rain, air pollution, etc. are the environmental issues. Therefore, chemistry is required to understand the environmental issues. Ozone, acid rain, air pollution, etc. are the environmental issues.