Can you be a little more specific? Thermodynamics is a very general set of ideas that can be applied to any system. It's kind of like asking, "How does thermodynamics apply to a donut?" Are you looking for examples involving the weather that could be used to teach thermodynamics to grade school, high school, or graduate students, for example? Why not come up with a few ideas, and I'm sure people would be willing to comment on them.