In this "Mini-sode", Maia covers Ocean Acidification: what is it, what causes it, and how does it happen? 

Seaquaria Ocean Education has a great Ocean Acidification free downloadable resource on their website, check it out here: https://seaquaria.org/educator-resources/ 

Resources:

https://www.nationalgeographic.com/environment/article/critical-issues-ocean-acidification

https://www.noaa.gov/education/resource-collections/ocean-coasts/ocean-acidification