1. I teach high school biology. Earth systems and climate change connect to pretty much every single unit that we cover. Even the ones where the connection is not an obvious, direct one-to-one thing, there are ways to fit a conversation about climate change into every unit. For example, when we are learning about the human body, body systems and homeostasis- we can have a conversation about earth's systems and how it is like an organism trying to maintain homeostasis. On the first day of school we actually usually have an interesting conversation about if the earth can be considered a living thing or not, and it is easy to draw parallels and make that connection.
Also, I want to teach my class through the lens of industrial agriculture. (I have this Great idea on how to do this, but it is So Much work to make that huge of a shift. I am trying to phase it in unit by unit so I don't drive myself bonkers. ) But industrial ag has so much of an impact on climate change, so the connections are really obvious in each and every unit.
2. SNOW DAYS! The frequency and intensity of storms is super compelling to my students. Also, hurricanes and their impacts. (socially, economically, politically and environmentally)