This resource is a great video to show students- this video illustrates how the application of science and chemistry has been successfully used to prevent (or delay) an environmental crisis that could have caused devastating environmental damage and harm to human life, because of skin cancer and mutation caused by sun exposure, and agriculture, because of the damage too much sun exposure can have on plants. Due to the previous heavy use of chlorofluorocarbons (CFCs), which are a coolant invented for refrigerators that is nontoxic and ended up in many products like hairspray, the ozone layer has a hole in it. The CFC molecules, when in the atmosphere, break apart due to exposure to UV light. Then, the chlorine reacts with ozone, which can drastically reduce its concentration in the atmosphere. This reaction is animated in this video, as well as a graphic of what the equilibrium should look like in our atmosphere. This video also demonstrates that some coolants we use now (Hydrochlorofluorocarbons (HCFCs)), though less damaging than CFCs, are still causing ozone depletion at a slower rate.

Connecting watching this video with a lesson on ozone or equilibrium could be effective. The equilibrium reaction in the atmosphere that absorbs most UV radiation is interrupted by the presence of CFCs, and the bonds used in ozone and oxygen gas are covalent. This also demonstrates how an unstable molecule can be formed under harsh conditions. 

This resource is a fantastic video to show students.  It illustrates how using coal with a high level of sulfates was causing an environmental crisis that was able to be corrected with policy. Examples of how action can effectively reverse and reduce damage can be very important to encourage students to continue pushing for change. Though companies managed to push back any reasonable policies that prevented air pollution for a decade by denying the scientists and influencing politicians, a policy called "cap and trade" was eventually put in place that effectively reduced pollution to levels that no longer caused acid rain in the US. I would connect it to this article which talks about how cap and trade improves citizens' lung health and doesn't just reduce acid rain. The countries that did not implement these sorts of policies are still dealing with this environmental crisis and health issues for citizens. Forgetting about successes made to prevent environmental crisis can encourage a mindset of hopelessness instead of a mindset that focuses on continuing the fight for change, but we also must remind students that there are still people suffering, and even though acid rain is no longer as bad in the US, air pollution is still a real issue.

This video could easily be paired with a beginning lesson on pH scales and acid-base reactions; there is a helpful graphic at the beginning about how a pH scale works, which is confusing to many students. Many people are confused about how pH relates to acidity, so this resource can help. Acid rain can damage and corrode buildings and this is a good example of an acid-base reaction. Also, since acid rain is caused by the formation of sulfuric acid, it can be connected to a lesson where students use this reaction to learn about balancing reactions.